PERN A. 



Anomioides, lleevc III. 



attenuata, Reeve VI. 



Austritlica, Reeve III. 



Califoniica, Conrad III. 



canina, Lamarck V. 



caudata, Reeve. .'. I. 



costellata, Conrad IV. 



Cumiugii, Reeve I. 



ephippium {Oslrea), Linuffius . . II. 



femoralis, Lamarck V. 



fimbriata, Reeve IV. 



imbricata, Reeve V. 



isognomum (Ostrea), Linnaeus . V. 



laticostata, Reeve II. 



legumen (Ostrea), Graelin .... V. 



lentiginosa, Reeve ... VI. 



Limoides, Reeve IV. 



linguffiformis, Reeve II. 



lobata, Reeve I. 



marsupium, Lamarck III. 



nucleus, Lamarck I. 



patibulum, Reeve IV. 



peetinata, Reeve I. 



quadrangulavis. Reeve II. 



rudis, Reeve V\ 



semiuuda, Lamarck II. 



serratula, Reeve III. 



Sjjathulata, Reeve VI. 



vespertilio, Reeve VI. 



vitrea, Reeve II. 



Vulsella, Lamarck V. 



ERRATUM. 



I'late v., Species 23, for V . Jimhr'mia read P. hnliricatn, Heeve. 



