590 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [88] 



Montacuta hidentata (Montagu). 

 B. range, 48 fathoms.* 

 C/ Leda unca Gould. 



B. range, 14 to 48 fathoms.t 

 Nucula proxima Say. 

 B. range, 14 to 15 fathoms ;t 48 fathoms.* 

 1/ Scapharca transversa (Say) H. & A. Adams. 

 B. range, 14 to 15 fathoms.t 

 Argina pexata (Ssiy) Gray. 



B. range, 14 to 15 fathoms.t 

 Pinna seminuda Lamarck. 

 . B. rauge, 14 to 48 fathoms.t 

 Pecten dislocatus Say. ^ 



B. range, 14 to 15 fathoms ; t 48 fathoms.* 

 (/ Anomia glabra Verrill. 

 B range, 15 fathoms.t 

 Ostrea equestris Say. 

 B. range, 14 fathoms.t 



FAUNA OF THE SURFACE WATER OF THE GULF STREAM. 



Collections of the invertebrate surface fauna were made at mauy 

 localities during this and previous seasons in the waters of the Gulf 

 Stream, both by means of hand-nets and towing nets, while porpoises 

 {Delphinus delpJiis), sharks, and fishes of various kinds have been taken 

 by the use of harpoons and hooks. By the use of muslin nets, known 

 as " trawl- wings," attached to the ends of the trawl frame, so as to be 

 somewhat above the bottom, many pelagic species have been obtained 

 which have not occurred in the surface nets. It is impossible, however, 

 m many cases to know whether such species actually live at or near the 

 bottom, at the surface, or in intermediate depths, for they are liable 

 to enter these nets at any time during the descent or ascent of the 

 trawl, as well as during the time that it is on the bottom. The trawl- 

 wings have, however, furnished a large number of species, of various 

 groups, which we have never taken in any other way, and it is probable 

 that many of these live swimming free, either near the bottom or at 

 various depths intermediate between the surface and bottom, where the 

 temperature may best suit them. In the surface nets a great many 

 eggs and young of fishes of various kinds are usually taken, the young 

 fishes varying in size from those just hatched up to 2 or 3 inches 

 in length. 



Copepod Crustacea are usually the most abundant forms of small 

 surface animals, occurring in great quantities and of many genera and 

 species. Various species of the genus Calanus are the most common. 



