SMITH : ON SOME LAND SHELLS FROM TRINIDAD. 29 



Hab. : Cuba, Jamaica, St. Thomas, St. Vincent and some other 

 islands ; also Brazil, Fernando Noronha, Venezuela, Colombia, 

 Bolivia : Trinidad (coll. Ponsonby). 



7. Succinea pusilla, Pfeiffer. 



Succineapusilla, Pfeiffer, Conch. Cab., ed. 2, p. 53, pi. v., figs. 27-29; 

 Sowerby, Conch. Icon., vol. 18, fig. 35 (enlarged). 



Hab.: Ceara, S. America; Guayaquil; Union Island, Grenadines; 

 Trinidad (coll. Ponsonby and Brit. Mus.). 



8. Veronicella sp ? 



Cockerell, Journ. Malacol, vol. 6, p. 5. 



Hab. : Caparo, Trinidad (Mr. Urich). Supposed to be a new species. 



9. Auricula pellucens, Menke. 



Auricula pellucens, Menke, Synopsis, p. 72 ; Kiister, Conch. Cab., 

 Auriculacea, p. 17, pi. ii., figs. 16, 17 ; Crosse, J. Conchyl., 1890, 

 p. 49; Pfeiffer, Mon. Auric, p. 137 (partim). 



Autonoe rifiaria, Guppy, Proc. Sci. Assoc. Trinidad, 1868, p. 244, 

 1872, p. 23 ; Amer. Journ. Conch., 187 1, vol. 6, p. 306, pi. 17, fig. 1 ; 

 J. Conch., vol. 7, p. 231, 1894. 



This species was omitted by Mr. Guppy from his latest list of the 

 land and freshwater mollusca of Trinidad, because, having obtained 

 only a single specimen, he appears to have regarded it as an accidental 

 introduction. As it has again been discovered by Mr. Lunt, until 

 proved to the contrary, it should be regarded as belonging to the 

 indigenous fauna. None of the four specimens sent by Mr. Lunt, 

 nor that described by Mr. Guppy, are as large as Menke's type from 

 Demerara. The shell is very thin, glossy, and sculptured with only 

 fine curved striae of growth, which distinguish it from the adult form 

 of A. tornaielliformis and some other allied species from the old world, 

 which are characterized by a very fine granular surface. I have 

 never seen the young of these species which are possibly smooth, like 

 the Trinidad specimens, all of which, on account of the thinness of 

 the outer lip, have an immature look. 



Appendix. 

 The young shell of Streptaxis deformis {2) is so unlike the adult 

 that it seems advisable to call attention to the fact by giving a figure 

 of it. At this age it might easily be mistaken for a species of Vitrea. 

 The specimen figured (fig. 5, 6) consists of 4^ whorls and is 4 mm. 

 in diameter. 



(2) No. 27 in list, /. Conch., vol. 8, p. 244. 



