482 



MANUAL OP THE MOLLUSCA. 



Synonyms, Psammotea (zonalis) Lamarck. Psammocola, W., 

 Gari, Schumaclier. 



Fig. 262. Psammobia vespertma, Chemn, |. Brit. 



Example, P. Ferroensis, PL XXI., Fig. 9. P. squamosa, 

 PI. XXI., Fig. 10. P. pallida, Fig. 263. P. vespertina, 

 Fig. 262. 



Shell oblong, compressed, slightly gaping at both, ends ; binge- 

 teeth y ; ligament external, prominent ; siphonal inflection 

 deep, in contact with the pallial line ; epidermis often dark. 



Fig. 263. Psammobia pallida, Desh. Red Sea. Left valve, part of the mantle, and 

 retractor of the siphons removed. Siphons much contracted ; a^ a, adductora, 

 p, p, pedal muscles. 



Animal, mantle open, fringed ; siphons very long, slender, 

 nearly equal, longitudinally ciliated, orifices with 6 — 8 cirri; foot 

 large, tongue - shaped ; palpi long, tapering; gills unequal, 

 recumbent, few plaited. 



Distribution, 50 species. Norway, Britain, India, New Zea- 

 land, Pacific. Littoral — coralline zone, 100 fathoms. P. gari 

 is eaten in India. 



Fossil, 55 species. Oolite? Eocene — . United States, 

 Europe. 



SAJS'GUHsroLAKiA, Lamarck. 



Name, from the type, Solen sanguinolentus, Chemn. 

 Synonyms, Soletellina {diphos), Bl. Lobaria, Schumachor, 

 Aulus, Oken. 



