MUSEUM OF COMPARATIVE ZOOLOGY. 59 



the sides. As seen from below the body whorl of the shell equals only about 

 one sixth of the total width. 



Habitat. Station 192, off Dominica, in 138 fms. ; Stations 274, 291, and 299, 

 off Barbados, in 140 to 209 fms., bottom temperature 50° to 56°. 5 F. 



This species is readily distinguished from any other of the group by the pos- 

 terior point, which, though smaller, recalls that of Clielidonura Adams. The 

 soft parts, however, have no resemblance to the very peculiar, and perhaps partly 

 hypothetical, figure of Quoy and Gaimard. P. amabilis Verrill is much nearer 

 P. aperta, from which, as far as the shell is concerned, it chiefly differs by being 

 a little narrower than the average aperta. The species are, however, quite 

 variable in this respect. 



Philine flexuosa M. Sars. 



Philine sp. ind. Ball, Bull. M. C. Z., IX. p. 99, 1881. 



Philine flexuosa (M. Sars) G. 0. Sars, Moll. Reg. Arct. Norv., p. 302, 1878. 



Habitat. Yucatan Strait, 640 fms. 



The fragment above referred to was identified by comparison with an au- 

 thentic specimen received by Jeffreys from Sars, and contained in the Jeffreys 

 collection. 



Family GASTROPTERID^. 

 Genus GASTROPTERON Meckel. 



Gastropteron sp. ind. 



A species of Gastropteron, which to a casual inspection did not differ from 

 the Mediterranean G. Meckelii Kosse, was obtained at Station 167, near Guade- 

 lupe, in 175 fms., sand, the bottom temperature being 55° F. Unfortunately, 

 before the specimens could be studied, the alcohol in which they were pre- 

 served evaporated by reason of a defective stopper, and it only remains to 

 chronicle the occurrence of the genus at the locality mentioned. 



Family UMBRACULID^E. 

 Genus UMBRACULU31 Schumacher. 



L'ombrelle, Lam., Extrait d'un Cours, 1812. Gray, List of Gen. P. Z. S. 1847, p. 163. 



Umbruculum, Schumacher, Essai, p. 177, 1817. 



Gastroplax, Blainville, Diet. Sci. Nat., XVIII. p. 176. Bull. Soc. Philom., p. 178, 



1819. 

 Umbrella, Lam., An. s. Vert., VI. p. 339, 1819; ed. ii., VII. p. 569. Blainville, Bull. 



Soc. Phil , p. 178, 1819. Fe'russac, Tab. Syst., p. xxix. Gray, Lond. Med. 



