2 Notes on certain Terrestrial MoUusks. 



Peiiang. Benson did not collect it at the Mauritius, though 

 Pfeiffer ascribes it (P. LargilUerti Phil.), on the authority of 

 Largilliert, to the Isle o( Bourbon. 



Benson says that Pupa hicolor " shelters itself in the ground 

 under the loose stones, bricks, or wood." At Bhamoury, he got 

 it "by digging at the root of a tree." The station of the species 

 is the same in St. Thomas. 



Pupa hicolor belongs to Ennea, a subgenus of Pupa, propos- 

 ed by H. and A. Adams in their Genera of MoUusks. Pfeiffer, 

 in Malak. Blatt., 1855, enumerates 22 species, of which 14 in- 

 habit Africa and adjacent islands, including Madagascar, — 4 

 the East Indies and Ceylon, -the habitat of the remaining 4 

 being unknown. 



The occurrence of this species in the Island of St. Thomas, 

 W. I., is extremely interesting. Hitherto it has only been 

 known as having the wide distribution in the East, described 

 by Benson, and it belongs to a subgenus (founded on the cha- 

 racters of the shell) not otherwise represented in the Western 

 Hemisphere. 



Under these circumstances, and considering the recent dis- 

 cover}^ of the species in a limited area near the town and har- 

 bor of St. Thomas. I can only look upon it as having been 

 accidentally introduced by the agency of man. 



II. On the Animal of Peoserpina, 



In a paper published in the Annals of the Lyceum (vol. iv., 

 p. 75), I explained that the animals of the species embraced in 

 the Fam. htlicinacea^ and also in the genus Proserpina^ destroy 

 the spiral column and septa of their shells. In another paper 

 (Ann., /. c, p 77), I showed that P. opalina C. B. Adams, hav 

 ing the spiral column and septa entire, must be restored to He- 

 lix, in which genus Adams originally placed it, and I proposed 

 for it the specific name, infortunata. 



