SMITH : NON-MAKINE MOLLTJSCA OF ST. VINCEIfT. 303 



Enumeration of the Species. 



1. Streptaxis (Ammonoceras) Thomasi (PfeifPer). 



Helix Thomasi, Pfr.— Pruc. Zool. Soc. 1854, p. 54; Monog. Hel., 

 vol. iv, p. 102; Reeve, Conch. Icon., sp. 1332. 



Streptaxis Thomasi.— Trjon, Man. Conch., ser. II, vol. i, p. 65, 

 pi. xiii, fig. 48, copied from Eeeve ; Pfeiffer, Nomenclator, 

 p. 15. 

 Hah.— Marmato, New Granada (Pfr.); "Dry forest, about 1,000 



feet, in crevices of rocks. Rare " (H. H. Smith). 



Also collected by Mr. Smith at Grenada, W.I. One specimen, 



larger than the rest, is 9 mm. in its greater diameter. The others 



are of about the same dimensions as those given by Pfeiffer. 



2. Stenopus cruentatus, Guilding. 



S. cruentatus, Guilding. — Zool. Journ., vol. iii, p. 527, pi. xv, 

 figs. 1-5; Swainson, MalacoL, p. 190, fig. 33, copy from 

 Guilding; Sowerby, Conch. Man., ed. 4, p. 283, fig. 515; 

 Gray, Fig. Moll. Anim., pi. Ixxii, figs. 2 and 4, after 

 Guilding, pi. cclxxxviii, fig. 4, copy of Swainson ; H. and 

 A. Adams, Gen. Moll., vol. ii, p. 221, pi. Ixxix, figs. 4, 4a, 

 after Guilding; Reeve, Conch. Icon., Helix, fig. 1463; 

 Tryon, Man. Conch., ser. II, vol. ii, p. 183, pi. liv, 

 fig. 26. 

 Hab. — Moderately plentiful on dead palm leaves on the summit 



of Mount St. Ancirea (Guilding) ; St. Vincent, no special locality 



(H. H. Smith). 



Only a single dead specimen in the present collection. 



3. ? Stenopus insidiosus, n.sp. PI. XXI, Pigs. 1-3. 



Testa parva, orbiciilaris, anguste umbilicata, tenuis, pellucida, 

 albida, polita ; spira supra anfractum ultimum leviter elata ; anfractus 

 4^ convexiusculi, ad suturam marginati, regulariter accrescentes, 

 Iceves, ultimus ad peripheriam rotundatus ; apertura lunata ; 

 peristoma tenue, simplex, margine columellari ad insertionem leviter 

 incrassato. Diam. maj. 5, min. 4*5 mm. ; alt. 3 mm. 



Hab.—" Soufi-iere Volcano, over 3,000 feet " (H. H. S.). 



Beyond its general form' there is nothing particular to characterize 

 this little species. The spire is more elevated, and the whorls enlarge 

 more slowly, than in S. cruentatus. 



4. GuppxA LiviDA (Guilding). 



Stenopus lividifs, Guilding. — Zool. Journ., vol. iii, p. 528, tab. supp. 27, 

 figs. 1-3; Sowerby, Conch. Man., ed. 4, p. 283, fig. 516; 

 Martens, Pestschrift Gesell. nat. Freunde Berlin, 1873, 

 p. 167, pi. ii, fig. 4; Tryon, Man. Conch., ser. II, vol. ii, 

 p. 182, pi. liv, fig. 16; Reeve, (Jonch. Icon., Helix, 

 fig. 642. 

 Hab. — Same as Stenopus cruentatus (Guilding) ; Venezuela 

 (Martens); St. Vincent (H. H. S.). 



A single specimen, without any special locality. Conulus vacans, 



VOL. I. — OCTOBER, 1895. 21 



