438 Mr. R. J. L. Guppj on new Species of 



somewhat noticeable. Not less remarkable is the rarity of 

 individuals — so much so that travellers may be pardoned for 

 having doubted if land-shells exist in Trinidad. The only 

 exception is perhaps Stenogyra octona. Bulimus ohlongus and 

 Cyclotus translucidus^ however, are rather abundant in some 

 very restricted localities. A contrast to this is presented by 

 the Antilles, where an hour's ramble or a search amongst 

 almost any group of balisiers or grove of trees is generally 

 rewarded by examples of the more abundant species. 



1. Sjpiraxis simplex^ n. sp. 

 Testa cylindrico-turrita, longitudinaliter sinuato plicata, lutescens, 

 epidermide straminea induta ; anfr. 8-9, vix convexi, ultimua 

 longitudinem spirae superaus ; sutura incisa ; apertura ovato- 

 oblonga ; columella valde torta vel reflexiuscula, truncata ; peri- 

 stoma simplex, supra et in mediis partibus paulo prominens. 



Shell turrite, rather thin, longitudinally sinuate-plicate, 

 whitish, covered with a light straw-coloured, somewhat shining 

 epidermis ; whorls 8-9, scarcely convex ; aperture ovate-ob- 

 long ; peristome simple, prominent above, receding below. 



Yar. a. Columella strongly twisted, broadly and obliquely 

 truncate ; aperture much dilated anteriorly. 



Var. yQ. Larger, rimate ; columella reflexed, scarcely truncate. 

 Dimensions of three examples. 

 «. Height 14 mill., greatest diam. 4, height of last whorl 7|, of apert. 4§ 

 )) 12 „ „ „ 5 „ „ 7^ „ 6 



^- V 15 „ „ „ 6 „ „ 7i „ 4^ 



2. Stenogyra plicatella, n. sp. 

 Bulimus octonoides, Guppy, non Adams. 

 Testa subulata, elongato-cylindrica, subperforata, cornea, parum 

 nitens, sinuato-striata ; anfr. 8-9, lente accrescentes, convexius- 

 culi, ultimus ventrosus ; sutura valida ; apertura elongata, ovaHs ; 

 peristoma simplex, supra paulo sinuatum, marginibus callo tenui 

 junctis ; columella recta, super umbilicum late reflexa. 



a. Shell subulate, elongate-cylindrical, subperforate, horn- 

 coloured, slightly shining, marked by numerous sinuate strise; 

 whorls 8-9, slowly increasing, the last somewhat ventricose ; 

 aperture elongate-oval ; columella reflexed over the narrow 

 perforation. 



/3. Generally larger ; whorls flattened, and impressed in the 

 middle by an indistinct sulcus ; the last whorl not ventricose ; 

 outer margin sinuate above ; aperture with its margins joined 

 by a callus. 



7. Smaller, more slender, waxy-white, shining ; coluinella 

 arcuate, not reflexed, sometimes subtruncate. 



