« OF CONCHOLOGY. 155 



ous observer in Natural History, and who has so extensively 

 contributed to our knowledge of the molluscan fauna, recent and 

 fossil, of the Antilles. 



The genus Q-uppya occupies a determinate position among the 

 genera to which it is related, either by the lingual dentition or 

 the pedal characters ; in a few words, it has the shell of Conulus, 

 with the pedal peculiarities of JYanina, the animal of which pre- 

 sents many distinguishing features. 



9. GUPPYA GUNDLACHI, Pfr. Sp. 



Whatever specific name should be applied to the species under 

 consideration, it undoubtedly belongs to the generic group having 

 Cr. vacans as a type. 



The foot is white underneath, light grey, with a bluish-black 

 streak above, truncated, but slightly acuminate inferiorly, cau- 

 dated superiorly, and provided with a mucus pore ; eye tentacles 

 blackish-red, the inferior tentacles grey. 



Living among moss on trees, Chontales forest and forest by 

 the river San Juan, Toro Rapids ; it inhabits Cuba. 



10. Helix griseola, Pfr. 



Common throughout the savanna region, Masapa, Grenada, 

 San Ubaldo, &c., living on the blades of grass, and resembling 

 in its habit IT. virgata, &c. It is quoted from Texas and Mexico, 

 but is not enumerated among the Guatemalan species by Tris- 

 tram. 



11. Helix CiECOiDES, Tate. Plate 16, fig. 2. 



Shell small, conoidally globose, minutely perforate ; whorls 

 four, convex, suture deep ; the epidermis somewhat shining, horny 

 brown, rising into distant equal rugulose oblique lamellte ; 

 aperture nearly circular, a little oblique ; peristome acute. 

 Diameter and height one-tenth of an inch. 



The shell of this species is closely related to H. cceca, Guppy, 

 H. Jerensis, Guppy, and, with H. hracticola, Guppy, and //. n. 

 sp. (San Lucia, Tate), constitute a group which has H. lamellata 

 in Europe, and H. lahyrinthica, in North America, for analogues. 



H. ccecoides lives among moss on trees, in company with 

 Guppya Gu7idlachi, Chontales forest. 



12. Helix Blakeana, Tate. Plate 16, fig, 3. 



Shell depressed, small, semitransparent, shining ; epidermis 

 greenish, strongly and regularly concentrically costulate, inter- 

 stitial spaces obscurely striated ; tt'/ior^s four, rounded, rapidly 



