CONCHIFERA. rday | 
Anatina Lam. Shell free, subequivalve, transverse, thin, fra- 
gile. Impression of mantle sinuate posteriorly. Animal with two 
trachez coalesced. 
Sp. Anatina subrostrata Lam., Solen anatinus L., Rumen. Amb. Rariteith. 
Tab. 45, fig. 0, Buatnv. Malac. Pl. 78, fig. 6, DusH. Conchyliol. PI. 8, 
figs. 20—23 ; in the Ind. Ocean, &c. Also of this genus fossil species 
occur in different secondary and tertiary strata. 
On the animal of this genus of conchifers, comp. H. Mirrre Mém. s. 1. 
genre Anatine, GUERIN Magas. de Zool, 1844, Moll. Pl. 1o2—104. 
Periploma Scuumacurr, Drsn. 
Osteodesma Desu. 
Lyonsia Turton, Drsu. 
Sp. Anatina norvegica SowERBY, Amphidesma corbuloides Lam., Mya nor- 
wegica CHEMN, Conchyl. Tab. 170, figs, 1667, 1668, DEsu. Conchyl. Pl. 
8, figs. 12—14. 
Myadora GRAY. 
Phalanx II. Myacea. Ligament internal, fixed to a fovea of 
each valve or to a cochleariform process of one valve and a fovea of 
the other. Trachez coalesced into a fleshy thickened cylinder. 
Pandora Brug. Shell inequilateral, thin, inequivalve, right 
valve flat, left slightly convex. Hinge in flat valve guarded by an 
exsert tooth, other valve emarginate to receive the tooth. Ligament 
received in a pit behind the hinge on each side, 
Sp. Pandora rostrata Lam., Tellina mequivalvis L., Buainv. Malacol. Pl. 
78, fig. 5, Cuv. R. Ani., éd. ill., Moll. Pl. 110, fig. 3; Medit.; this species 
occurs fossil in the crag-formation of England. There are also two other 
fossil species from the tertiary formations, and some from the Indian Sea 
known. 
Corbula BruG. Shell inequivalve, with right valve more con- 
vex. Cardinal tooth in each valve conical with lateral pit. Liga- 
ment inserted in tooth of left valve and in pit of right. 
Sp. Corbula nucleus Lam., Mya inequivalvis Montacu, Encycl. méth. » Vers. 
Pl. 220, fig. 4, DEsu. Conchyl. Pl. 8, figs. 7—9; in the N. Sea and Medi- 
terranean. Within the last few years many species from all seas have 
become known; the fossil Species are even more numerous, and occur 
Some in secondary, but in great part in tertiary strata. 
Lrvilia Turvoy. Shell inequivalve. Other characters almost 
those of Corbula. 
Comp. Recivz in Guérin Magas. de Zool, 1844, Pl. 95, 96. 
