211 



Genus Mytilimeria, Conr. Journ. p. 246. 



Testą cequivalvis, subovalis, tenuis ; umbonibus subspiralibus ; 

 cardine edentulo, cavitate parva, lineari, sub umbonibus šita ; 

 cicatricibus muscularibus ii. minoribus ; sinu pallii lato, ob- 

 tuso. 



Apparently a subgenus of Lyonsia, with the regular form of 

 Crenella = Mytiliineria, H. & A. Ad. Gen. vol. ii. p. 363, pars. 



7. Mytilimeria Nuttalli, Conr. Journ. p. 247. p. 19. f. 5. 

 Hab. California, inter spongias et radices fucoruni, mari pro- 



fundo. Mus. Brit., Jay. 



8. Lyonsia Californica, Conr. Journ. p. 248. pi. 19. f. 20. 

 (nan 21.) 



? = Lyonsia nitida, Gould. Mus. suo. 

 Hab. Sta. Barbara. Mus. ? 



9. Periploma argentaria, Conr. Journ. p. 238. pi. 18. f. 8. 

 Hab. In limine Stae. Diego, inter paludes limosas. Mus. Cuming, 



Jay, Gould. 



=^Periploma planiuscula, Sow. 1834, teste Gould. 



10. Pandora punctata, Conr. Journ. Phil. 1834, p. 228. pi. 17. 

 f. 1. 



Hab. Sta. Barbara ; valvae solitarise. Mus. Cuming, Nutt. 



Genus Mach^ra, Gould. 

 =^Siliqua, Megerle : = Ze^MTOrean'a, Schum. 



11. Mach^ra ltjcida, Conr. 



Solecurtus lucidus, Conr. Journ. p. 231. pi. 17. f. 8. 

 =/S. radiatus, Gould, non Linu. (teste Conr. 1849). 

 Siliqua lucida, Conr. Journ. Aug. 1849. 

 Hab. Sta. Barbara, rarė. Mus. Nutt., Brit. 



Closely resembling the European species ; but, according to 

 Conrad, differing from this, and agreeing with that of New England. 

 The rib is seen through the shell, resembling a yello'vvish ray. 



12. Solecurtus Nuttallii, Conr. Journ. p. 232. pi. 17. f. 9. 



Siliqua Nuttallii, Conr, Aug. 1849. 



= S. maximus, Gould, non Wood (teste Conr. 1849) = Wood, 

 pi. 31. f. 3, teste Gould, 1855. 



=S. splendem, Chenu (teste Conr. 1849). 



Hab. In aestuario fluminis Columbise, "near Point Adams," palu- 

 dibus. Mus. Nutt., Jay. 



