158 JS'otes on certain Terrestrial Mollusca. 



convexiusculi, ad suturam leviter impressam breviter striato-marginatse, 

 ultimus latior, non descendens; apertura fere verticalis, lunato-rotun- 

 data ; perist. simplex, acutum, margine columellari vix reflexiusculo. 



Shell perforate, depressed, thin, minutely striatulate, shining, 

 diaphanous, horny-amber ; spire nearly level ; whorls 4, rapidly 

 increasing, scarcely convex, with shortly striated margin at the 

 lightly impressed suture, the last wider, not descending ; aper- 

 ture almost vertical, lunate-rounded ; peristome simple, acute, 

 the columellar margin scarcely reflexed. 



Diam. maj. 8 ; min. 7 ; alt. 3 mill. 



Rahitat. — Porto Cabello, Venezuela. Kobert Swift. 



Remarks. — I received one specimen of this interesting spe- 

 cies, with the animal, from Mr. Robert Swift, and submitted it 

 to Edward S. Morse for microscopic examination, and to him I 

 am indebted for the accompanying figures and the substance of 

 the subjoined notes. 



Fio. 8. 



e 



Stenopus ? Guildingi Bland. 



Fig. a. Shell with animal, about the natural size. 



h. Head magnified ; superior tentacles partially retracted. 

 Morse mentions that he could find no trace of the 



