HELIX. 161 



callus ; peristome thick, bilabiate, reflexed, columellar margin 

 adnate, thickened, appressed at the insertion of the callus. 



Diam. 30, alt. 14J mill. 



Quaternary of Ins. Teneriffe, at the lighthouse of Ana ga. 



Allied to verneani and cacoplasta. The peculiar compressed form 

 of the body-whorl is very characteristic. 



H. VERNKAUI Mabille, 1882. PI. 47, fig. 70. 



Imperfbrate, subglobose-depressed, solid, opaque, destitute of color 

 and cuticle, obliquely, arcuately plicato-striate ; spire conic, sub- 

 prominent, apex obtuse, substriate ; whorls 5-6, subrounded, rapidly 

 increasing, especially the last, separated by simple narrowly im- 

 pressed sutures ; body-whorl large, angulate, compressed above, 

 turgid toward the aperture (carina evanescent) and slightly con- 

 stricted, slightly inflated below, suddenly and shortly deflected ; 

 aperture somewhat oblique, wide lunate-ovate ; peristome thick, 

 subbilabiate, acutely reflexed, margins subapproximating, the outer 

 curved, the columellar well curved, adnate, appressed at the insertion 

 of the callus. Diam. 28-30, alt, 14-15 mill. 



Quaternary of Ins. Teneriffe, near the lighthouse of Anaga. 



H. IDRYTA Mabille, 1882. PI. 47, fig. 80. 



Imperforate, depressed-conic, destitute of color and cuticle, opaque, 

 striate, and with indistinct decurrent stride, obscurely subgranulose, 

 spire conic, apex minute, obtuse, punctate; whorls 5, slightly de- 

 pressed, regularly and rapidly increasing; suture impressed, especially 

 at last whorl ; body- whorl large, angulate, laterally compressed be- 

 fore the aperture, abruptly descending and constricted at the peri- 

 stome, convexo-inflated below; aperture oblique, lunate, irregularly 

 ovate; peristome double, reflexed, margins converging, the outer 

 sinuous tuberculate, angulate, the columella thick, broadly appressed, 

 expanded over the umbilicus. Diam. 19-25, alt. 12A-13 mill. 



Quaternary of Ins. Teneriffe, near Anaga. 



Distinguished from its congeners by the nearly effaced strife and 

 slight granulation, the development of the linguaform duplication 

 on the outer lip, the marked angulation of the body- whorl, and the 

 wide, excavated columellar margin, smooth and rounded inside. 



H. HEDONJCA Mabille, 1882. PL 47, fig. 83. 



Imperforate, depressed-conic-subglobose, solid, destitute of cuticle 

 and color, costulate-striate and irregularly minutely malleate, spire 

 cenvexo-conic, apex obtuse, rugose-punctate ; whorls 5, slightly con- 

 11 



