174 THE BERMUDA ISLANDS. 



Cerithium feTrugineam, Say. 



C. versicolor, Adams. 

 C. Bermudas, Sowb. 

 C. Eriense, Val. 

 Florida, W. Indies. 

 Cerithium, sp. ? 



A form apparently closely related to Cerithium diadema, 

 Watson, from Madeira. 



Fotamides minimus, Gnel. 



P. nigrescens, Menke. 



P. albovittatus, Adams. 



?P. zonale (in part), Brug. 



E. United States, W. Indies, Europe. 



Triforis turris-Thomse, Chemn. 



St. Thomas. 



Triforis intermadius, Adams. 



St. Thomas. 



Bissoina crassicostata, Adams. 



St. Thomas. 

 Bissoina Sagraiana, D'Orb. 



St. Thomas. 



Rissoina micans, Adams, in Jones's list 

 Hydrobia f 

 Nerita peloronta, L. 



W. Indies. 

 Nerita tessellata, Gtmel. 



W. Indies. 



Kerita versicolor, Gmel. 



Florida, W. Indies, Costa Rica. 



ITeritina viridig, L. 



W. Indies, Lancerote, Mediterranean. 



