21 
Fam. 12. Paphiade. 
Mantle lobes united. Pedal opening small, anterior. Gills two 
on each side, produced, truncated behind, not united behind the 
foot. Lips transversely striated within. Siphons short, separate ; 
anal largest. (See Ann. & Mag. N. H. xi. 1853, 44.) 
l. Paputa. 
1. P. cornea, t. 318. f. 1, 2, 3, 5. 
Fam. 13. ? Anatinellade. 
Animal unknown. (See Ann. & Mag. N. H. xi. 1853, 43.) 
i. Cardinal teeth very oblique. Hinder nearly parallel with hinge- 
margin. Cartilage external, marginal. Umbones subspiral. 
Fam. 14. Glosside. 
Foot compressed, truncated, short, small. Pedal opening rather 
contracted; lips simple. Shell free. 
1. GLossus. 
IGs Cort. 626. f 18329: 
Fam. 15. Chamade. 
Foot very small, rather produced in front. Lips foliaceous, qua- 
drangular. Pedal opening very small. Siphons two, short. Shell 
uregular, attached by the outer surface of one valve. 
1. CHama. 
1. C. Lazarus, t. 357. f. 4 (fig. 5). 
Fig. 5.—Chama Lazarus. 
aa', adductor muscles. p, pedal muscle. d, dental membrane. /, tentacle. 
g, small outer gill. e, anal siphon. 4, branchial siphon. f, pedal 
orifice. m, mantle line. 0, ovarium. J, liver. 
iv. Hinge toothless. Cartilage internal, in a pit, with an imbedded 
shelly appendage in front. 
Fam. 16. Anatinide. 
Siphons elongate, generally separate. Gills pmnate, apparently 
