PHASIS-TRACHYCYSTIS. 145 



Helix (Pella) minythodes M. & P., Ann. Mag. N. H. (6), ix, 

 p. 240, t. 13, f. 8. 



A neat, horn-colored shell, with a very thin, almost smooth epider- 

 mis, without gloss. Whorls depressed, very obscurely striated ; per- 

 istome thin, triangularly reflexed over the umbilicus, which is very 

 narrow but deep ; mouth slightly squamose at the base. Three 

 specimens. (M. & P.) 



P. CONISALEA Melvill & Ponsonby. PI. 35, fig. 4. 



Shell semi-pellucid, thin, narrowly umbilicated, whitish, orbic- 

 ulate-depressed ; spire convex ; whorls 5, convex, narrow, the last 

 longitudinally densely lirate, and covered all over with a very thin 

 silky-setose epidermis, the setae short, regularly situated upon the 

 lirse, and so disposed as to give the aspect of transverse lines. Aper- 

 ture lunar-oblong, patulous ; peristome thin, membranous, reflexed 

 at the columellar margin. Alt. 5, diam. 62 mill. (M. & P.) 



Maritzburg, South Africa. 



Helix (Pella) conisalea M. & P., Ann. Mag. N. H. (6), ix, p. 239, 

 t. 13, f. 7. 



A little shell with the aspect of the British H. hispida L. orsericea 

 Mull. ; but when examined with a lens the whole pellucid surface is 

 seen to be covered with a delicate epidermis and upon the longitu- 

 dinal lirse are ranged with regular precision crowded short setee, 

 so straightly disposed as to give the effect of transverse lines. The 

 whorls are convex, five in number; umbilicus small, lip thin, 

 reflexed at the columellar margin over the umbilicus. Superficially 

 the shell has a dusty appearance suggesting the trivial name. 

 Several specimens. (3/. & P.) 



P. TUGURIOLUM Melvill & Ponsonby. PI. 35, fig. 1. 



Shell covered umbilicate, thin, whitish horn colored, subplanate, 

 swollen beneath. Whorls 5, longitudinally very indistinctly striated, 

 transversely delicately and minutely concentrically decussated, 

 aperture lunar ovate ; peristome simple, a little reflexed at the col- 

 umellar margin. 'The largest specimen measures: 



Alt. 6, diam. 81 mill. (M. & P.) 



South Africa (Layard.) 



Helix (Pella) tuguriolum M. & P., Ann. Mag. N. H. (6), ix, p. 88, 

 t. 5, f. 5. 

 10 



