Mr. E. A. Smith on the Genus Sphenia. 279 
Sphenia Binghami, Forbes and Hanley, Brit. Moll. vol. i. p. 190, pl. T. 
fig. 3, and pl. ix. figs, 1-3. 
Mya Binghami, Jeffreys, Brit. Conch. vol. iii. p. 70, pl. L. fig. 3. 
flab. Great Britain, France, Spain, Piedmont, Algeria, 
Tunis. 
2. Sphenia Riippellit, A. Adams. (P1.XV.A. figs. 2,3.) B.M. 
Sphenia Riippellii, A. Adams, Proc. Zool. Soc. 1850, p. 89. 
Hab. Red Sea. 
This is a true Sphenia, and has been wrongly transferred 
to Cryptomya in the Paetel Catalogue, p. 21. It is clothed 
more or less with a yellowish epidermis, and is peculiar on 
account of a few radiating lines upon the anterior end of the 
valves. 
3. Sphenia fragilis, Carpenter. (PI. XV.A. figs. 4,5.) B.M. 
Sphenia fragilis. Carp. Mazatlan Cat. p. 24. 
Sphenia fragilis, De Folin, Les Méléagrinicoles, p, 15, pl. ii. figs. 7-9. 
Hab. Mazatlan, west coast of Mexico. 
The types of this species in the British Museum are rather 
more equilateral than the shell figured by De Folin. Corbula 
luticola, Valenciennes (Voy. Vénus, Zool. Atlas, pl. xxiv. 
figs. 6, 6a), has never, as far as I can discover, been 
described. Carpenter suggests that it may be the same as his 
S. fragilis. ‘This may be so, but without examining the type 
it is impossible to determine definitely The form and size of 
the shell, its position in a crypt, and the tooth of the lett 
valve are characteristic of Sphenia. 
4, Sphenia bilirata, Gabb. 
Sphenia bilirata, Gabb, Proc. Ac. Nat. Sci. Philad. 1861, p. 369, 
Hab. Santa Barbara, California. 
Perhaps the young stage of Saaicava. 
5. Sphenia ovoidea, Carpenter. 
Sphenia ovoidea, Carp. Proc. Ac. Nat. Sci. Philad. 1865, p. 54. 
Hab, Puget Sound, 
S. ovalis, Carp. (Moll. West. North Amer. p. 168), appa- 
rently is a misprint for ovoidea. 
6. Sphenia perversa, Blanford. (PI. XV. A. fig.6.) B.M. 
Sphenia perversa, Blanford, Journ. Asiat. Soc. Bengal, vol. xxxvi. (ii.) 
p. 68, pl. xiv. figs, 4-6 (1867). 
Hab, Delta of the Irawady, Pegu; in burrows in stone, 
apparently the holes of Aartesia. 
Mr. Blantord makes a curious mistake with regard to the 
