466 



742 i securis, 



743 i solidula, 



744 i transverse, 

 744 j truncata, 



Prime, Cambridge, Bost. Proc., 1852, p. 160. 



Prime, Ohio, Bost. Proc., 1852, p. 158. 



Say, Ohio, Say, Descr. Shells, 1840, p. 10. 



Lindsley, Connecticut, Sill. Journ., 2nd ser., 6, p. 234. 



746 i abditum, Hald., 

 746k altile, Anth., 



747 i compressum, Prime, 

 752 o variabile, Prime, 

 752 r ventricosum, Prime, 



GEN US PISIDIUM. (P. 32.) 



Proc. Ac. N. Sci. 1841, p. 53. 



Pennsylvania, 



Ohio, 



Massachusetts, 



Massachusetts, 



Massachusetts, 



Bost. Proc., 1852, p. 164 

 Bost. Proc., 1852, p. 163. 

 Bost. Proc., 1852. 



752 v Africana, 



Krauss, 



GENUS CYRENA. (P. 33.) 

 Africa, Krauss, Siidaf., p. 8, pi. 1, f. 8. 



GENUS CYTHEKEA. (P. 36.) 



is Cytherea rosea, Brod. 



Cytherea lepida, Chenu. 



Artemis juvenilis ? var. 

 Cytherea scalaris, Menke. 



951 i astartoides, Beck, Greenland, 



959 erase this number on p. 39, before catenifera. 



991 i foliacea, Phil., Red Sea, 



1002 erase this number on p. 40, before gallus. 



1010 i hiantina, Lam., 32 Australian Seas, 



1011 i interrupta, Koch, Indian Seas, 

 1027 i Manhattensis, Prime, New York, 

 1084 i tellinasformis, Ph., 



GENUS VENUS. (P. 38.) 



Phil. Icon., 3, pi. 9, f. 4. 



Phil. Icon., pi. 5, f. 1, p. 107. 



Chenu, pi. 6, f. 3. 

 Phil. Icon., 3, pi. 8, f. 7. 

 Prime MSS. 

 ? Phil. Icon., 3, pi. 9, f. 1. 



