MUSEUM OF COMPARATIVE ZOOLOGY. 119 



OTHER LOCALITIES. 

 The following recent species were collected by Professor Agassiz at 



Nassau. 



Polygijra microdonla Desbayes. 



Pleuwdonle (Thelidomus) provisaria Pfr. 



Hemilrochus Troscheli Pfr., varieties. 



Cerion cinereum Maynard. 



Truncatella, probably caribceensis Sby., young. 



Gun Cay. 



Cerion cinereum Maynard. 

 Cerion pannoxum Maynard. 

 Hemilrochus Troscheli Pfr. 



Great Ragged Cay. 

 Cerion cinereum Maynard. 



" Glass Window," Eleuthera Island. 

 Cerion striatellum Feru.ssac ; small and delicate. 



Flamingo Cay. 



Chondropoma hiforme Pfr. 



Cerilhium (Pyrazus) seplemstriatum Say. 



Cerithium {Pyrazus) Raivsoni Krebs. 



Ceritkidea cnstafa Wood. 



Cyrena colorala Prime. 



FOSSIL REMAINS OF MOLLUSKS. 



The rock in which the fossils are found is the geolian rock common through- 

 out the Bahamas. 



The fossils are nearly all of recent species, and differing in no marked way 

 from the existing sea shells of the same species now found in the waters about 

 the island. Land and marine shells are more or less intermixed, as they are 

 at the present day along the shores. 



One of the species collected in a fossil state at Nassau by Professor Agassiz 

 does not seem to be represented in a recent state, but, as our knowledge of the 

 fauna of the Bahamas is still very imperfect, it would be rash to say that it 

 may not be found living hereafter. It is at lea.st probable that the species is 

 not now living about Nassau, which has been visited by so many collectors, 



