20 



ROCHESTER ACADEMY OF SCIENCE. 



[Nov. 23, 



Many of the species enumerated have a very wide geographical 

 distribution ; as for example Aplustnim physis, found abundantly 

 throughout the West Indies ; and a number of the Cyprreidre, which 

 are common to both the Mauritius and the New Caledonian Archi- 

 pelago. 



Unlike the larger island to the west, Madagascar, the Mauritius 

 has very few species peculiar to itself, and those that are peculiar are 

 mostly confined to the families Testacellidrc and Limacidae. I believe 

 the present collection to embody a larger number of species, repre- 

 sented by more numerous individuals, than any previous collection 

 which has come to this country from this locality, and I feel that I 

 have been especially favored in having the opportunity of studying 

 it. I trust the following catalogue may be of some assistance to my 

 brother students, who may be working upon the fauna of this inter- 

 esting region. 



Class GASTROPODA. 



Order PULMONATA. 



Family TESTACELLIDiE. 



1. Gibbus Lyonetianus, Fa/las. Said to be somewhat rare. 



2. " (Goniodomus) pagodus, Fer. 



3. " (Plicadomus) sulcatus, Miiller. 



4. " " Newtoni, H. Adams. 



5. " (Gonospira) modiolus, Fer. 



6. " " Mondraini, H. Adams. 



7. " " Barclay!, H. Adams. 



8. " " mauritianus, Morelet. 



9. " " modiolinus, Morelet. 



10. " " teres, Pfr. 



11. " '^ bacillus, Pfr. 



12. " " sp. 



Of the forty-eight species of Gibbus (not including the sub- 

 genus Etinea H. cV' A. Adams) known to science, twenty-one inhabit the 

 Mauritius. All of the foregoing species are found abundantly dis- 

 tributed throughout the island. 



