HELIX. 171 



triangular, showing the bands within ; peristome a litUe thickened, 

 shortly subreflexed, sublabiate within, margins not approximating. 

 the upper arcuately descending, sometimes with a small tubercle,, 

 the basal, rather flattened, subcallous, straight within, expanded 

 and appressed at the insertion. Diam. 17-24 mill, alt. 13-18 mill. 



Ins. Gomera, Canaries. 



The peristome usually bears traces of the teeth which are BO 

 prominent in the preceding forms. From them, the globose, thin 

 shell at once separate it. 



H. CONSOBRINA Ferussac, 1819. PI. 50, figs. 87, 88. 



Imperforate, depressed, solid, yellowish brown, with five dark 

 brown bands, the upper ones generally interrupted with light flam- 

 mules ; spire depressed conic, sutures slightly impressed ; whorls 4 ' , 

 upper ones scarcely convex, the first shining, light brown, micro- 

 scopically granulate, as is the whole shell usually ; last whorl wi<l<\ 

 becoming wider toward the aperture, finely reticulate-malleate, 

 irregularly striate, smoother below, not angulate, the last third 

 gibbous below, above descending rather abruptly to the aperture, 

 scarcely contracted behind the peristome ; lip more or less widely 

 reflected, its face thickened, rounded, white or pinkish, microscop- 

 ically granulate, the margins converging, joined by a thin or moder- 

 ate callus; upper margin arched, outer margin with an obtuse 

 subobsolete tooth-like callus upon its face, lower margin broad, 

 flattened, bearing inside a dentiform callus. 



Diam. 19-23, alt. 11-14 mill. 



Ins. Teneriffe, Canaries. 



I am not satisfied with the synonymy of the consobrina group ; for 

 I believe that several of the following forms are merely varieties of 

 that species. It is impossible however, to work the species out with 

 the meagre material before me. 



A var. vetmta Mouss., is more depressed, suture less impressed, 

 last whorl subangulate, and aperture smaller than the type. 



H. EVERGASTA Mabille, 1882. PI. 48, figs. 100, 101. 



Imperforate, subglobose-conic, solid, sub-shining yellowish rufous, 

 with four conspicuous brown bands, irregularly costulate-striate and 

 with very dense decurrent lines, visible only under a lens, giviu 

 the shell a peculiar granulose appearance; spire conic, prominent, 

 apex minute, obtuse, concolored, rugose; whorls 5, slightly convex 

 regularly increasing, separated by subimpressed sutures, accompai 



