200 Note on certain Terrestrial MoUusks. 



sent to me for determination by Sir Eawson W. Eawson, to 

 whom I dedicate the species. 



W. G. Binney, in the preceding paper, has described the 

 jaw and dentition of the animal, pointing out the peculiarities 

 of the latter as compared with other species of the genus. 



As might be expected from the geographical position of 

 Montserrat, the land shells inhabiting it, belong to the same 

 fauna as that of the neighboring islands. With A, Hawsonis, 

 were found H. Josephinoe, B. exilis, Helicina Guadelwpensis 

 and picta. 



Helix Van Nostrandi, nov. sp. {Triodopsis) . 



This species is in form and character of the aperture very nearly allied 

 to H. introferens, but is more decidedly costate, more convex at the base, 

 with smaller umbilicus, and without the internal tubercle. It connects 

 introferens and vultuosa with, but is quite distinct fvom fallax. 



The measurements of a specimen with Q>h. whorls, are, diam. max. 12^ : 

 min. 11, mill. Alt. 7 mill. Of a specimen with G whorls; diam. max. 10; 

 min. 8 mill. ; alt. 5 mill. 



Several specimens were collected at Aiken, S. Carolina, in 

 the winter of 1874-5 by Miss Emma Van Nostrand, daughter 

 of my esteemed friend Mr. Henry D. Van Nostrand. 



Mr. W. Gr. Binney has, in the preceding paper, described 

 the dentition of this species. 



[Printed at the Salem Pkess, March, 1876.] 



