484 MR. G. F. AN GAS ON THE [Julie 3, 



32. Helicina lindeni, Pfr. 



H. lindeni, Pfr. Monog. Pneumon. Viv. vol. i. p. 388 ; Chemn. 

 Conch.-Cab. ed. 2, p. 52, pi. 8. figs. 25, 26. 



The specimens, of which three were found, are rather larger than 

 the type, which is from Mexico. Costa Rica, 



33. Helicina funki, Pfr., large var. (Plate XL. fig. 7, auimal.) 

 H.funki, Pfr. Monog. Pneumon. Viv. vol. i. p. 361. 



Many specimens. " Talamanca, all the coast region, and to the 

 lower hills" (Gabb). 



" Animal brownish white ; head and lower tentacles white ; animal 

 very timid " (Gab b). Much larger than the type, which is from 

 New Granada. Varies in colour from straw-yellow to orange. 



34. Helicina lyrata, Pfr. 



Helicina lyrata Pfr. Monog. Pneumon. Viv. vol. i. p. 341. 

 One specimen. Costa Rica. 



<R% VfS J 35. Helicina Beatrix, n. sp. (Plate XL. fig. 13.) 



Shell conical, solid, shining ; as seen through the lens, very finely 

 transversely striated ; whorls 6, very slightly convex, the four upper- 

 most chestnut, the fifth dark red, with an opaque whitish band below 

 the suture, the last pale olive-green, with a similar opaque band at 

 the suture ; outer lip thickened, a little expanded and reflexed ; 

 aperture quadrately semilunate. 



Var. Smaller and straw-coloured throughout. 



Diam. 4§, alt. 5 lin. 



Very few specimens. " Found only on the hills up to an elevation 

 of 2500 feet. Animal dark grey above, sides and foot white" 

 (Gabb). Approaches H. heloisas, Salle, but larger and much more 

 conical. 



36. Succinea undulata, Say. 



Succinea undulata, Say, New Terrestrial Shells, p. 24. 



"Coast region to lower hills" (Gabb). A dozen specimens. 

 "Animal bright flesh-colour, robust, 'and marked by a few dark 

 spots; lower tentacles very short" (Gabb). 



37. Stenopus guildingi, n. sp. (Plate XL. fig. 14.) 



Shell perforate, globosely conical, thin, shining, very finely ob- 

 liquely striated, brownish ash-colour ; whorls 6 \, convex, the last 

 with a thread-like keel at the periphery ; apex conical ; sutures 

 margined ; base convex ; aperture crescent-shaped; outer lip arcuate, 

 simple, thin ; columellar margin scarcely dilated. 



Diam. 2, alt. 1| lin. 



Hab. Costa Rica. 



This little species differs from £. lividus, Guild., in having the 

 sutures margined with a strongly defined thread-like carina at the 

 periphery, and one more whorl. 



