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Freshwater and Marine ... (178)

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Shellfish (177)
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Oysters of different ages a: Oysters from 12 to 14 months old. b: Oysters from 5 to 6 months old.
1. Oysters of different ages
a: Oysters from 12 to 14 months old. b: Oysters from 5 to 6 months old. c: Oysters from 3 to 4 months old. d: Oysters from 1 to 2 months old. e: Oysters from 15 to 20 days old
Figs. 1-20 illustrate the growth of the seed oysters caught on small stones. Figs. 1-10 show three-month-old
2. Figs. 1-20 illustrate the growth of the seed oysters caught on small stones. Figs. 1-10 show three-month-old oysters attached to living snails (littorina littorea). Figs. 11-14 show the oysters of the same age attached to small stones. Figs. 15-18 show oysters one and one-half years old attached to small peggles, while Figs. 19-20 show two and one-quarter-year-old oysters attached in the same fashion. Fig.16 gives a peculiar illustration of the method of attachment. The young oyster has formed an attachment to a second pebble towards its free end at some distance from the first, indicating that the mantle, even at the age of one year, retains the power of secreting a fixative.
Oysters Grown on the Pacific Coast and Their Enemies: 1. Native, or 'Olympia' Oysters. 2. Sea Snail
3. Oysters Grown on the Pacific Coast and Their Enemies:
1. Native, or 'Olympia' Oysters.
2. Sea Snail (Polynices lewisii), which destroys many oysters annually.
3. Eastern Oyster Bred near Nasel River, Willapa Harbor, Wash.: for many years it was supposed the Eastern Oyster would not breed on this coast.
4. Japanese oyster introduced on this coast.
5. Cluster of young native oysters.
[Oysters] : The small oysters are natives from Yaquina bay, some of them showing the spat of this year
4. [Oysters] : The small oysters are natives from Yaquina bay, some of them showing the spat of this year attached to the shell. Of the two larger shells the rougher one is an average sized shell of a Virginia oyster from the New Jersey coast. As is well known, oysters from many other localities are decidedly larger than this. The smoother large shell is from an eastern oyster grown in Yaquina bay. This, again, is hardly representative, for I have been shown shells much larger
Oysters Grown on the Pacific Coast and Their Enemies: 1. Native, or 'Olympia' Oysters. 2. Sea Snail
5. Oysters Grown on the Pacific Coast and Their Enemies:
1. Native, or 'Olympia' Oysters.
2. Sea Snail (Polynices lewisii), which destroys many oysters annually.
3. Eastern Oyster Bred near Nasel River, Willapa Harbor, Wash.: for many years it was s
Pound stakes covered with a heavy set of year-old oysters from Great South Bay, 1921. The convex surface
6. Pound stakes covered with a heavy set of year-old oysters from Great South Bay, 1921. The convex surface of brush, takes, tarred rope, etc., will produce good oysters when thickly covered with spat
One-year-old oysters that set on tar-coated pound nets in Great South Bay, Long Island, 1921. Such a
7. One-year-old oysters that set on tar-coated pound nets in Great South Bay, Long Island, 1921. Such a collector is suitable for producing excellent single oysters from heavy sets, with little mortality from overcrowding
Spat Oysters from 1 to 60 mm. (1/25 to 2 2/5 inches) in length, natural size, in the same position
8. Spat
Oysters from 1 to 60 mm. (1/25 to 2 2/5 inches) in length, natural size, in the same position throughout, from the right side.
Oysters from Cunning Harbor Experimental Plant (14) taken July 22, 1905, after 23 months: Representative
9. Oysters from Cunning Harbor Experimental Plant (14) taken July 22, 1905, after 23 months:
Representative Oysters
Oysters from Harbor Island plant, showing good shape of oysters
10. Oysters from Harbor Island plant, showing good shape of oysters
Clamshell heavily set with thousands of young spat...and a portion of the shell enlarged to show the
11. Clamshell heavily set with thousands of young spat...and a portion of the shell enlarged to show the detailed structure of the spat
a, spat just attached; b, spat one day old; c, spat two days old. The clamshell was taken from Great South Bay in 1921 and illustrates the heavy loss of young oysters that must occur on such a hard, firm material on which all but 8 or 10 are lost from overcrowding and suffocation
Young oysters, about three months old, attached to the upper valve of living scallops, taken at Wellfleet
12. Young oysters, about three months old, attached to the upper valve of living scallops, taken at Wellfleet in October, 1908. As these oysters increase in size they prove detrimental to the welfare of the scallops, and finally may cause their death
Group of Year-Old Native Oysters attached to a Cockle Shell, from the Clifton Reserve (1): Group of Young
13. Group of Year-Old Native Oysters attached to a Cockle Shell, from the Clifton Reserve (1): Group of Young Oysters Attached to the Valve of an Eastern Oyster, from the Clifron Reserve (2)
Young Oysters (Age Three to Six Months) Set on Oyster Shells and a Rubber Shoe Taken in Dredging for
14. Young Oysters (Age Three to Six Months) Set on Oyster Shells and a Rubber Shoe
Taken in Dredging for Oysters
Oyster shell upon the inside of shich about one hundred and fifty oysters have fastened themselves (2);;
15. Oyster shell upon the inside of shich about one hundred and fifty oysters have fastened themselves (2);; Pipe, upon the bowl of which six oysters have grown; from the Chesapeake Bay (1)
Starfish Attacking Oysters From Fifth Annual Report of Connecticut Bureau of Labor Statistics
16. Starfish Attacking Oysters
From Fifth Annual Report of Connecticut Bureau of Labor Statistics
Bunch of Oysters from Great Point Clear Reef Showing Growth of Mussels and Barnacles
17. Bunch of Oysters from Great Point Clear Reef Showing Growth of Mussels and Barnacles
[Oysters] Fig.1, Hinge or anterior umbonal end of the left valve of an adult oyster Fig.2, Drawn
18. [Oysters]
Fig.1, Hinge or anterior umbonal end of the left valve of an adult oyster
Fig.2, Drawn from a dissection of a hardened specimen
Fig.3, Viscera of the oyster
Fig.4, Section or slice cut from the soft parts of an oyster
Groups of Oysters of different ages attached to a block of wood
19. Groups of Oysters of different ages attached to a block of wood
Young Oysters furnished with locomotive organs
20. Young Oysters furnished with locomotive organs
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