GASTROCHiE^A, 2 species on plate 471. 



Fig. 



28. TENERA, sp. 20, Deshayea, Proc. Zool. Soc. 1854.- 



Philippines. 



29. MACROCHiSMA, sp. 16, B&shayes, Proc. Zool. Soc. 1854.- 



Philippines. 



SAXICAVA, Fl. de Belleime. 



1. ARCTiCA, sp. 1, Linnceiis. — Hiatella arcticn, Larak. ; 



H. minuta, Turt. ; Donax rkomboidds, Desh. — British 

 and N. American coasts. 



2. AUSTRALis, sp. 2, LcimarcJc. — Var. S. distoHa, Say ; 



(Mactra) crassa, Peron. — Australia, United States. 



3. RDQOSA, sp. 3, Linnmus. — Sax. gallicana, Lamk. ; 



Mya byssifera, Fabr. ^-British and French coasts. 



4. SPINIFERA, sp. 8, Sowerby. — Savannah Bay. 



5. PHOLADis, sp. 10, Lamarck, An. s. vert. — Greenland. 



6. Gderinii, sp. 4, Fayraudeau, Moll. pi. 1. — Mediter- 



ranean. 



7. PDRPURASCENS, pp. 5, Sowerby, Proc. Zool. Soc. 1834. — . 



Hab.— ? 



8. PETiTii, sp. 11, Deshayea, MS. Cum. Coll. — Hab.—? 



9. SULCATA, sp. 12, Deshayea, MS. Cum. Coll. — R. Clyde. 



10. FLACCIDA, sp. 14, Gould, North America. 



11. TENUIS, sp. 7, Sowerby, Proc. Zool, Soc. 1834. — Hab. — ? 



12. SOLIDA, sp. 6, Soiverby, Proc. Zool. Soc. 1834.— Hab. — ? 



13. siMiLis, sp. 9, Deshayea, Moll, de I'lle Reunion. — Isl. 



Bourbon. 



14. Angasii, sp. 13, A. Adams, Proc. Zool. Soc. 1865. — St. 



Vincent's Gulf. — S. Australia. 



