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Photograph of the nest of a horned dace (Semotilus atromaculatus), taken with a reflecting camera and
1. Photograph of the nest of a horned dace (Semotilus atromaculatus), taken with a reflecting camera and by the aid of a cloth screen.... The reflected image of part of the screen is seen over the right and left parts of the nest. In the upper part of the picture at the right above S.T. is the sand trail; to the left of this, above P, is the pit in the bottom of which are large pebbles; farther to the left, above G.R., is the gravel ridge with its top dressing of fine pebbles. The end of the ridge, its structure of coarse pebbles, is within the pit at the left
Interior of rearing car, and propeller. 1. slot in end of car; 2. doors for closing the slot; 3. side
2. Interior of rearing car, and propeller. 1. slot in end of car; 2. doors for closing the slot; 3. side screen windows; 4 and 5. bottom windows; 6. box covering gear trains; 7. transverse shaft; 8. longitudinal shaft; 9. towing car. The arrangement of shafting on farther float can be seen
Equipment of McDonald automatic tidal boxes, for hatching cod, Boothbay Harbor, Me. Shows boxes lifted
3. Equipment of McDonald automatic tidal boxes, for hatching cod, Boothbay Harbor, Me. Shows boxes lifted out of troughs and bottom upward on farther tables. The bottom is of scrim, and by means of cleats is held 1 1/2 inches above the bottom of the trough at the center. By an arrangement of partitions at the head of the trough the eggs receive the supply of water through the scrim bottoms of the boxes, also through a small hole in one end of the box. The distinctive feature of the apparatus, whence it is called 'tidal,' is the automatic siphon outflow, by menas of which the water is alternately drawn down and replenished. Standpipe with siphon cap is shown near troughs; waste trough below
Local distribution of the 'whelk' Buccinum undatum, whose range is from Greenland to 'off New Jersey,'
4. Local distribution of the 'whelk' Buccinum undatum, whose range is from Greenland to 'off New Jersey,' and perhaps farther south
Heavy Ice Prevented Farther Progress North
5. Heavy Ice Prevented Farther Progress North
   
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