MOLLUSCA. 
28 ^ 
Ti'uncatella (Taheitid) clatJirata, sp. n,, H. Adams and Angas, Proc. Zool. 
So3. 18(35, p. 64, pi, 2. fig. 2, Salomon Islands j T. toallacei, H. Adams, ibid, 
p. 41G, pi. 21. figs. 13 k 14, Wnigiou. 
Helicinid^. 
Helicina arakanetisis, sp. n., Blanford, Journ. As. Soc. Bengal, 1865, p, 85, 
Aralian. — H. zocc and guttula, sp, n., Pfr. Mai. Bliitt. xii. p. 124, Moluccas. — 
II. plicatilh^ sp. n., Mousson, Journ. Oonch. xiii. p. 178, Upolu, Samoa Islands ; 
II. vitiensis, sp. n., Mousson, ibid. p. 198, Feejee Islands ; II. jiazi^ sp. n., 
Crosse, Journ. Oonch. xiii. p. 221, pi. 6, fig. 8, Gambier Islands; H. pacijica^ 
sp. n.. Pease, Am. Journ. Conch, i. p. 291, Polynesia. 
Helicina turhinata (Wiegmann), deppeana (Martens), and zephyrina (Du- 
clos) are three Mexican species closely allied to each other ; their affinities 
and differences are pointed out by Martens, Mai. Blatter, xii, pp. 6-9 ; II . 
deppeana figured, pi, 1. figs. 11 & 12. 
Helicina viridis (Lam.). The shell figured by Belessert as this species 
is evidently = FT. versicolor (Pfr.) from Hayti ; the species described by Gray 
and Sowerby as viridis (Lam.) is distinct, and not known from autopsy to 
Br. Pfeiffer, perhaps identical with one seen by the Recorder in Mousson’s 
collection as a native of Java. Whether Belessert is right in using the 
Lamarckian name is hot quite clear, as Lamarck’s description does not fully 
agree with the figure given by Belessert. Martens and L. Pfeiffer, Mai. Bliitt. 
xii. pp. 174-176. 
PROSERPINIDiE. 
Prosetpinclla, g. n.. Bland. With one small parietal lamella, without 
columellar fold. P. herendti, sp. n.. Bland, from Mirador, Mexico, 3000-4000 
feet above the sea: Ann. Lyc. Nat. Hist. New York, viii. p. 167, with wood- 
cut, Proserpina sivifti, described by the same author two years ago, without 
parietal lamella, but with columella fold, is figured, 1. c. p. 156. 
Order SOLENOCONCHtE. 
Pcntalium rectius, sp. n., Carpenter, Proc. Ac. Nat. Sc. Philad. 1865, 
p. 69, Puget Sound. 
Helonyx, g. n., Stimpson. Shell small, subulate, polished, almost hyaline^ 
arcuated, swollen before the middle and contracted at the mouth, posteriorly 
attenuated, with the margin of the anal aperture entire. Foot greatly elon- 
gated, cylindrical, obtuse at the extremity ; collar apparently entire. Anal 
siphon longer than in Dcntaliiim, not fissured. The shell resembles that of 
an Annelid, Ditrupa^ by the contraction of the anterior extremity. The 
typical and only living species is Dentalium clavatnm, Stimps., from Hong- 
kong, on muddy bottom, at depths of from six to twenty fathoms. Some species 
described as from the Cretaceous, Eocene, and Miocene formations are referred 
to this genus: — D. coarctatum (Lam.), thallus (Conrad), (Gabb)j and 
Diirupa subcoarctata (Gabb). Am. Journ. Conch, i. p. 63, pi. 9. fig. 14. 
Class CONCHIFERA. 
Seeley, H. A help to the identification of fossil bivalve shells. 
The Geologist, 1864, Feb. pp. 44-50, 
