21 
Fam. 12. Paphiadoe. 
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. fy Mag. N. H. xi. 1853, 44.) 
1. Paphia. 
1. P. cornea, t. 318. f. 1, 2, 3, 5. 
Fam. 13. ? Anatinelladce. 
Animal unknown. (See Ann. fy Mag. N. H. xi. 1853, 43.) 
hi. Cardinal teeth very oblique. Hinder nearly parallel with hinge- 
margin. Cartilage external, marginal. Umbones subspiral. 
Fam. 14. Glossidce. 
Foot compressed, truncated, short, small. Pedal opening rather 
contracted; lips simple. Shell free. 
1. Glossus. 
1. G. Cor, t. 326. f. 1, t. 329. 
Fam. 15. Chamadce. 
Foot very small, rather produced in front. Lips foliaceous, qua- 
drangular. Pedal opening very small. Siphons two, short. Shell 
irregular, attached by the outer surface of one valve. 
1. Chama. 
1. C. Lazarus, t. 3 57. f. 4 (fig, 5). 
Fig. 5. — Chama Lazarus. 
a a\ adductor muscles, p, pedal muscle, d, dental membrane, t , tentacle. 
g, small outer gill, e, anal siphon, b, branchial siphon, f, pedal 
orifice, m , mantle line, o, ovarium. I, liver. 
iv. Hinge toothless. Cartilage internal, in a pit, with an imbedded 
shelly appendage in front. 
Fam. 16. Anatinidce. 
Siphons elongate, generally separate. Gills pinnate, apparently 
