﻿392 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Sonud and the shores of Ehode Island. The Sjnrialis Gould ii Stimp. 

 is probably also an arctic species, and is very closely related to, if not 

 identical with, S. halea of the Arctic Ocean.* There are, however, a few 

 of the more tropical species that have been already recorded as occa- 

 sionally cast ashore dead, upon the southern shores of Xew England. 

 Of these Diacria trispinosa and CavoUna tridentata are the most com- 

 mon. Of the former, I have also received numerous examples, with the 

 animal in good condition, obtained by Mr. Samuel Powell, at Newport, 

 E. I., several years ago, from the stomach of a blue-fish. This season 

 two living specimens of it were taken off Block Island by Messrs. Y . N. 

 Edwards and jST. P. Scudder, of our party. The fresh shells of this spe- 

 cies were dredged by us in 1871, near Martha's Vineyard, and this year 

 we found it in abundance and perfectly fresh, in all our outer dredgings, 

 70 to 100 miles off shore. It was associated with Biacrla trispinosa Gray 

 and several other species, named below, but was far more numerous than 

 any of the others. The following species are here introduced because 

 of their common occurrence, evidently in large numbers, within a few 

 miles of our coast. Several of them have not been recorded from so far 

 north before, even in mid-ocean. 



Cavolina longirostris (Les. MSS., Hv.) H. «S: A. Ad, 



HyuUva longirostris Blainv., Diet. Sci. Nat., xxii, p. 81. — Rang, Hist. Nat. 



Pterop., p. 41, pi. 2, figs. 7-10, 1852. 

 CavoUna longirostra Gray, Catal. Moll. Brit. Mus., Ptcropoila, p. 8. 



This small but elegant species occurred frequently in our dredgings, 

 but not in large numbers (stations 807, 870, 870, 891, 894, &c.). 



Cavolina uncinata (D'Orb.) Gray, 1850; H. & A. Ad. 



Hyalma uncinata D'Orb., 1838. — Rang, Hist. Nat. Pterop., p. 37, pi. 2, ligs. 11- 

 14, 1852. 



This occurred in many localities, with the last. Our specimens differ 

 from the figures referred to in having the median posterior spine more 

 hooked and more abruptly bent, so as to make nearly a right angle with 

 the shell. 



Cavolina inflexa (Les.) Gray. 



Hyaleea injlesa Lesneur; Blainv., Diet. Sei. Nat., xxii, p. 80. 



One' perfect and full-grown specimen from station 894. 



Clio pyramidata Bro^\Tie ; Liim6; Gmelin. 



Cleodora j)ijramidata Faron & Lies. ; Lamarek. 



Clcodora lanccolata Rang, Ann. des Sci. Nat., xvi, p. 497, pi. 19, fig. 1. 



Clio pyramidata Gray, Catal. Moll. Brit. Mus., Pteropoda, p. 12, 1850. 



Several fresh but somewhat broken specimens of this species occurred 

 at stations 805, 891 to 891. 



* It is very distinct from <S. rctroversus, to wliieli Jeffreys has formerly referred it. 

 Both the figure and description give it sj>iral lines, while the latter is very smooth. 

 G. O. Sars identifies it with S. halea. 



