HELIX. 157 



oblique, transverse lunate-oval ; peristome obtuse, very thick, convex- 

 reflexed, sublabiate witliin, margins subremote, joined by a rather 

 thick callus, the upper and lower subparallel, the basal thickened, 

 with a long dentiform callus inside, widely expanded, appressed and 

 callous at insertion. Diam. 33, alt. 24 mill. (Mousson.') 



Ins. Fuertaventura, Canaries. 



A rare sub-fossil species, said to be somewhat intermediate between 

 the lactea and sarcostoma types. 



H. BATHYCAMPA Mabille, 1883. PL 47, figs. 84, 85. 



Imperforate, subglobose, rather thick, somewhat shining, rudely 

 striate, and under a lens minutely granulate, yellowish rufous or 

 purplish, with five bands often interrupted with yellowish macula- 

 tions; apex obtuse, rugose, purplish; whorls 5, very rapidly increas- 

 ing, separated by impressed sutures, the last large, tumid-rounded, 

 convex below and above, slightly compressed at the suture, slightly 

 constricted at the aperture, and strongly, suddenly deflexed anterior- 

 ly; aperture oblique, lunate, ovate-rounded, the ends approximating; 

 peristome thickened, broadly reflected and flattened, rufous, colu- 

 mella margin subreflexed, with a dentiform lamella. 



Diam. 29, alt. 18 mill. Fuertaventura, Canaries. 



The shell is thinner than in H. sarcostoma, and the sculpture 

 different. 



H. SUBGRAVIDA Mabille, 1882. PI. 47, fig. 86. 



Imperforate, solid, thick, subglobose-depressed, entirely covered 

 with minute points and scarcely apparent costulations ; spire conic, 

 a,pex minute, obtuse; whorls 5, slightly convex, irregularly increas- 

 ing, suture na*rrowly impressed ; body-whorl large, angled in front 

 of the aperture, but becoming swollen and rounded, anteriorly briefly 

 deflexed ; aperture oblique, lunate, irregularly ovate ; peristome 

 widely reflexed, slightly thickened within, the ends subconverging, 

 joined by a conspicuous callus; columellar margin nearly straight, 

 provided with an elongated tooth, widely expanded over the umbil- 

 ical tract. Diam. 30, alt. 17 mill. 



Ins. Teneriffe, Canaries. 



Compare H. r/ravida Mouss. 



H. BAKCKERIANA Mabille, 1883. PI. 40, fig. 10. 



Imperforate, depressed, thick, solid, scarcely shining, destitute of 

 color and epidermis, but with three or four obscure rufous bauds, 



