180 
MOLLDSCA. 
Hydrocena similis, sp. n., Baird, 1. c. p. 440, pi. xxxix. figs. 1 & 2, 
Samoa Islands. 
Georism muUilirata^ sp. n.. Brazier, P. Z. S. 1874, p. G70, pi. Ixxxiii. 
figs. 8-10, with operculum, Fitzroy Island, N. E. Australia. 
SOLBNOCONCH^. 
Dentalium hexagonum (Gould) and octogonum (Lam.) from Japan ; 
Lischke, Jap. Meer. Conch, iii. pp. 74 & 75, pi. v. figs. 4-7, & 1-3. 
[^DentaliiiTn^ Entilis agilis (G. O. Sars ?) and striolata (Stimps.). 
Animals in various positions ; Yerrill, P. Am. Ass. 1873, pi. i. figs. 3 & 4. 
Dentalium panormitanum (Chenu), Jilum (G. B. Sow.), dredged on 
the coast of Sicily, and described by Monterosato, J. de Conch, xxii. 
p. 25G: 
Siphonodentalium tetragonum (Brocchi, 1814) = quinquangulare 
(Forbes) ; id. 1. c. p. 257. 
LAMELLIBRANCHIA. 
A list of Diatomacece found in the stomach of Mytilus edulia is given 
by J. Deby, P.-v. Mai. Belg. 1874, p. ccii. Diatomacece and spores of 
Algce found in the stomach of Ostrea virginiana^ by MacCrady, P. Bost. 
Soc. xvi. p. 170. 
Clessin discusses the fresh-water genera of the Bivalves, wrongly in- 
cluding Septifer among them, and omitting Fucheria ; MT. Ver. Reich. 
1874. 
Pholadid.®. 
Pholas davidij sp. n., Deshayes, Bull. N. Arch. Mus. ix. p. 7, pi. i. 
fig. 2, Taku, N. China. 
Pholadidcea tridens (Gray) ; E. Smith, Moll. Voy. Ereb. & Terr. pi. ii. 
fig. 8, type. 
Myid.®. 
Poromya forheui, n., H. Adams, P. Z. S. 1874, p. 68G, locality un- 
known. Poromya is identical with Embla (Loven), but distinct from 
Thetis (Sow.) and Eucharis (Reel.) ; id. ibid. 
Saxicavid^. 
Saxicava angulata (S. Wood) = Arcinella carinata (Philippi), recent 
in the Mediterranean ; Monterosato, J. de Conch, xxii. p. 255. 
Panopea japonica (A. Ad., 1849) = fragilis ('Gould, 18G1), from 
Yeddo, described; Lischke, Jap. Meer, Conch, iii. pp. 104 & 105. 
