208 CONTRIBUTIONS TO GEOLOGY. 



Pectunculus obliqua (nobis), resembles P. nanus of M. 

 Deshayes, pi. 36, figs. 4 and 5. 



Ostrea divaricata (nobis), resembles O. flabellula of 

 Lamarck, as figured by M. Deshayes, pi. 63, figs. 6 and 7. 



Solen Blainvillii (nobis), resembles Solen effusus of Lam- 

 arck, as figured by M. Deshayes, pi. 11, figs. 24 and 25. 



