482 



MANUAL OP THE MOLLIJSCA. 



Synonyma, Psammotea (ssonalis) Lamarck. Psammocola, Bl 

 Guri, Schumacher. 



Fig. 262. Psammobia vespertina, Chemn, \. Brit. 



Example, P. Perroensis, PI. XXI., Fig. 9. P. squamosa, 

 PI. XXL, Pig. 10. P. pallida, Fig. 263. P. vespertina, 

 Fig. 262. 



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

 teeth y ; ligament external, prominent ; siphonal inflection 

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



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

 retractor of tbe siphons removed. Siphons much contracted ; a., a, adductors, 

 p, p, pedal muscles. 



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

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

 largo, 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. 



Sai^guinolaeia, Lamarck. 



• Name, from the type, Sole7i sanguinolentus, Chemn. 

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

 Aulus, Oken. 



