114 HELIX-LUCERNA. 



H.picturata AD., Contrib. to Conch, p. 30, 40, 98. (Oct. 1849.) 

 PFR., Monogr. iii, p. 212; iv, p. 214; v, p. 316; Conchyl. Cab. t. 

 153, f. 12. REEVE, f. 235. H. sinuata DELESSERT, Recueil. t. 26, f. 

 10. PFR. in Conchyl. Cab. t. 15, f. 5, 6. CHENU, 111. Conch., Helix, 

 t. 12, f. 10. H. sinuata var. p, PFR. Monogr. i, p. 305. 



This beautifully-decorated species need not be compared with H. 

 sinuata and its allies, for it lacks the short furrow above the periph- 

 ery behind the aperture which those forms possess. H. valida, 

 H. bronni and H. strangulata are its nearest allies, but all of them 

 have the two outer teeth united at base, while in H. picturata the 

 union is very slight. Fig. 51 represents a form without the charac- 

 teristic color-markings ; such shells may still be known by the other 

 peculiarities just mentioned. Umbilicated specimens are much 

 less common than imperforate ones. The smallest specimens of the 

 species I have seen measure, alt. 10, diam. 18 mill. 



H. PALLESCENS Shuttleworth. PI. 37, figs. 54-60. 



Separated from all other species which lack a furrow above the 

 periphery behind the peristome, by the wider umbilicus, and the de- 

 velopment of the parietal margin of the aperture ; peristome solute ; 

 free from the body-whorl. 



Umbilicate, depressed, solid, nearly lusterless, light-yellowish, 

 sometimes tinged above with brownish; all over densely, finely 

 granulate ; spire low, slightly convex; apex smooth, light colored; 

 planulate ; sutures well impressed from the beginning; whorls 

 nearly 5, convex, slowly widening, the last wider, but decidedly 

 narrowed as it nears the aperture, convex below, rounded or 

 obscurely carinate at the periphery, dee} ly, abruptly descending 

 anteriorly, constricted by three deep furrows behind the peristome ; 

 aperture subhorizontal, light-brownish or cream-colored within, 

 transverse, wedge-shaped ; peristome sinuous, broadly expanded, its 

 face thickened, produced, solute, continuous, free from the preced- 

 ing whorl, its basal margin bearing within four strong pliciform 

 obliquely-entering teeth. Alt. 12-14, diam. 25-27 mill. 



Jamaica. 



H. pallescem SHUTT. (in Mus. Cuming) PFR., Monographia iv, p. 

 309; v, p. 413. 



** * 

 H. SINUATA Miiller. PI. 27, figs. 72-75. 



H. sinuata, simson, invalida, sinuosa and anomala form a little 

 group of species characterized by a short furrow above the periph- 



