360 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Dredging stations on the outer hank in 1880. 



The temperature determiiiatious, owing to the violeut motions of the 

 steamer, are unreliable at stations 8G5 to 872. At stations 873 to 878 the 

 bottom temperature was usually 51° to 53^ F.; at 879 to 881 it was 42° 

 to 430 F.; at 893 and 894, it was 4(P. 



CEPHALOPODA. 



The great abundance of Cephalopods in the deep-water localities ex- 

 plored by us is a very interesting and important discovery. Eight 

 si)ecies were taken this season. Some of these occurred in large num- 

 bers. This collection adds three genera to the New England fauna, two 

 of them new and very curious. 



Heteroteuthis tenera Verrill. 



Amer. Joiiru. Science, xx, p. 392, for Nov., 1880 (published Oct. 25). 

 A small and delicate species, very soft and translucent when living. 

 Body shortish, cylindrical, scarcely twice as long as broad, posteriorly 

 usually round, but in strongly contracted, preserved specimens often 

 narrowed and even obtusely pointed ; front edge of mantle with a dorsal 

 angle extending somewhat forward over the neck. Fins very large, thin, 

 longer than broad; the outer edge broadly rounded; the anterior edge 

 extending forward quite as far as the edge of the mantle and consider- 

 ably beyond the insertion of the fin, which is itself i^laced well forward. 

 The length of the liii is about two-thirds that of the body; the base or 

 insertion of the fin is equal to about one-half the body length ; the 

 breadth of the fin is greater than one-half the breadth of the body. Head 

 large, rounded, with large and prominent eyes ; lower eye-lid slightly 

 thickened. Arms rather small, unc<pial, the dorsal ones considerably 

 shorter and smaller than the others. In the male the left dorsal arm is 



