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392 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
Sound and the shores of Rhode Island. The Spirialis Gouldiit Stimp. 
is probably also an arctic species, and is very closely related to, if not 
identical with, S. balea 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 trispinosa and Cavolina 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, 
R. L, several years ago, from the stomach of a blue-fish. This season 
two living specimens of it were taken off Block Island by Messrs. V. 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 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 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. Ad. 
Hyalea longirostris Blainy., Dict. Sci. Nat., xxii, p. 81.—Rang, Hist. Nat. 
Pterop., p. 41, pl. 2, figs. 7-10, 1852. 
Cavolina longirostra 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, 894, &c.). 
Cavolina uncinata (D’Orb.) Gray, 1850; H. & A. Ad. 
Hyalea uncinata D’Orb., 1836.—Rang, Hist. Nat. Pterop., p. 37, pl. 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. 
Hyalea infleca Lesueur; Blainv., Dict. Sci. Nat., xxii, p. 80. 
One perfect and full-grown specimen from station 894. 
Clio pyramidata Browne; Linné; Gmelin. 
Cleodora pyramidata Peron & Les. ; Lamarck. 
Cleodora lanceolata Rang, Ann. des Sci. Nat., xvi, p. 497, pl. 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. 
*Tt 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. balea. 
