208 CONTRIBUTIONS TO GEOLOGY. 
Pectunculus obliqua (nobis), resembles P. nanus of M. 
Deshayes, pl. 36, figs. 4 and 5. 
Ostrea divaricata (nobis), resembles O. flabellula of 
Lamarck, as figured by M. Deshayes, pl. 63, figs. 6 and 7. 
Solen Blainvillit (nobis), resembles Solen effusus of Lam- 
arck, as figured by M. Deshayes, pl. 11, figs. 24 and 25. 
