HELIX. 161 



callus ; peristome thick, bilabiate, reflexed, columellar margin 

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



Diam. 30, alt. 14* mill. 



Quaternary of Ins. Teneriffe, at the lighthouse of Annr/n. 



Allied to verneaui and cacoplasta. The peculiar compressed form 

 of the body-whorl is very characteristic. 



H. VERNEAUI Mabille, 1882. PL 47, fig. 70. 



Imperforate, 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 An<.<,<t. 



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



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

 striate, and with indistinct decurrent strise, 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. 12;>-13 mill. 



Quaternary of Ins. Teneriffe, near Anaga. 



Distinguished from its congeners by the nearly effaced stride 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. HEDONICA Mabille, 1882. PL 47, fig. 83. 



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

 and color, costulate-striate and irregularly minutely roalleate, spir 

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

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