HELIX. 37 



Subsection V. PLACENTULA, Lowe. 1854. 



H. COMPAR, Lowe. PI. 7, fig. 20. 



Kather narrowly umbilicated, solid, strongly, arcuately costate 

 with white, with an obsolete band above, and a more distinct band 

 on the base, suture deep ; whorls 6-6 J, convexly flattened, the last 

 deflected and shortly solute in front, periphery carinated, b'ase more 

 convex ; peristome \vhite, continuous, a little expanded. 



Diam. 8 mill. 



Madeira, and Deserta Australis. 



H. TJENIATA, Webb and Berthelot. PI. 7, figs. 21-23. 



Widely umbilicated, striate, ashy, with a superior chestnut band ; 

 whorls 7, margined above the suture, periphery carinated ; peris- 

 tome free, a little thickened. Diam. 8 mill. 



Madeira. 



Not Canarian, as given by Webb and Berthelot, Pfeiffer, etc. 



H. MADERENSIS, Wood. PL 8, fig. 24. 



Moderately umbilicated, somewhat solid, whitish corneous, base 

 with a chestnut band, costulate-striate above, base striulate, smooth- 

 ish ; whorls 6, somewhat convex, the periphery carinated, subgranu- 

 lar and suddenly deflected in front ; peristome simple, subcontinu- 

 ous. Diam. 6 mill. 



Madeira. 



It is H. eydostoma, Menke. 



H. LEPTOSTICTA, Lowe. PI. 8, fig. 25. 



Rimately perforate, rather thin, rugulosely striate and slightly 

 granular, diaphanous, corneous, obsoletely banded, suture im- 

 pressed; whorls 5-1, slightly convex, the last obsoletely angulated, 

 descending in front, base hardly more convex ; peristome simple, 

 nearly continuous. Diam. 6'6 mill. 



Madeira. 



H. MICROMPHALA, Lowe. PI. 8, fig. 26. 



Rimately subperforate, somewhat solid, striulate and minutely 

 granular, not shining, brownish, obsoletely darker banded ; whorls 

 6, scarcely convex, the last dilated and shortly deflected in front, 

 periphery subaugulated, base more convex and smoother ; peristome 

 simple, margins approximating. Diam. 8 mill. 



Deserta Islands, near Madeira. 



