CONCHIFERA. 48] 
GASTRANA, Schumacher. 
* 
Synonyms, Fragilia, Desh. Diodonta, F. and H., not Schu- 
macher. . 
Type, Tellina fragilis, L. Pl. XXI., Fig. 8. 
Shell, equivalve, convex, with squamose lines of growth ; 
cardinal teeth 2 in right valve, 1 bifid tooth in left; pallial sinus 
deep and rounded; umbonal area punctate; ligament external. 
Animal with the mantle open in front, its margins fringed ; 
siphons elongated, slender, separate, unequal, orifices with cirri ; 
foot small, compressed, linguiform; palpi large, triangular ; 
gills unequal, soft, finely striated. 
Gastrana inhabits shallow water, boring in mud and clay, and 
not travelling about like the Tellens. 
Distribution, 3 species. Norway, Britain, Mediterranean, 
Black Sea, Senegal, Cape. 
Fossil, Miocene—. Britain, France, Belgium. 
CapsuLs, Schumacher. 
Etymology, Dimin. of capsa, a box. 
Synonyms, Capsa (part), Brug. 1791. Sanguinolaria, Lamarck, 
1818, not 1801. 
Type, C. rugosa, Pl. XX., Fig. 19. (== Venus deflorata, 
Gmel). 
Sheli oblong, ventricose, shghtly gaping at each end; radiately 
striated ; cardinal teeth 2 in each valve, one of them bifid ; liga- 
ment external, large, prominent; siphonal inflection short. 
Animal like Psammobia; foot moderate; gills deeply plaited, 
attenuated in front, outer small, dorsal border wide, fixed; 
siphons moderate. 
Distribution, 4 species. West Indies, Red Sea, India, China, 
Australia. 
fossil, 20 species. Carb. —. United States, Europe. (D’Orb.) 
QUENSTEDTIA, Morris and Lycett. 
Hinge in left valve with obtuse, oblong, transverse teeth ; 
pallial sinus small; ligament in a narrow groove; cardinal 
teeth 0.1. 
PSAMMOBIA, Lamarck. Sunset-sheil. 
fymology, psammos, sand, bio, to live. 
a 
