392 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Sound and the shores of Eliode Island. The Spirialis Gouldii Stimp. 

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

 identical with, 8. 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 New England. 

 Of these Diacria trlspinosa and CavoUna tridcntata are the most com- 

 mon. Of the former, I have also received numerous examj)les, with the 

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

 El. 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 N. P. Scudder, of our party. The fresh shells of this spe- 

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

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

 70 to 100 miles oil' shore. It was associated with Diacria 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., Bv.) H. & A. Atl. 



Hyalcea longirostris Blainv., Diet. Sci. Nat., xxii, p. 81. — Kaug, Hist. Nat. 



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

 Carolina loiigirostra Gray, Catal. Moll. Brit. Mus., Pteropoda, p. 8. 



This small but elegant species occurred frequently in our dredgings, 

 but not in large numbers (stations 867, 870, 876, 891, 891, &c.). 



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



Hyalcoa uncinata D'Orb., 1836. — Raug, Hist. Nat. Pterop., p. 37, j)!. 2, figs. 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. 



Hijalwa inflexa Lesneur; Blaiuv., Diet. Sci. Nat., xxii, p. 80. 



One perfect and full-grown specimen from station 894. 



Clio pyramidata Browne ; Linu6; Gmelin. 



Cleodora pyramidata Peron & Les. ; Lamarck. 



Cleodora lanceolafa 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 865, 891 to 894. 



* It is very distinct from S. retroversus, to which Jeffreys has formerly referred it. 

 Both the figure and description give it spiral lines, while the latter is very smooth. 

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



