PHASIS-TRACHYCYSTIS. 141 



P. HOTTENTOTA Melvill & Ponsonby. PI. 35, fig. 8. 



Shell small, deeply but narrowly umbilicated, globose-depressed, 

 olivaceous-horny, thin ; lirate with close, oblique strife, here and 

 there thicker, as if varicose. Whorls 4*, a little convex, the last 

 subeffuse. Aperture lunar-ovate ; peristome very thin, columellar 

 margin reflexed. Alt. f, diam. 1 1 mill. (M. & P.) 



Port Elizabeth, S. Africa. 



Helix hottentota M. & P., Ann. Mag. N. H. (6), viii, p. 239 ; ix, 

 p. 94, t. IV, f. 6. 



An extremely minute, thin, horny, subpellucid shell, olive-brown 

 in color, very deeply though somewhat narrowly umbilicate, very 

 finely obliquely close-ribbed throughout (but this is barely distin- 

 guishable without a lens) ; the plications of the stride are occasion- 

 ally thicker, giving here and there an appearance of varices ; lip 

 simple, very thin, columellar margin slightly reflected at the umbil- 

 icus. This species cannot be confounded with any other from South 

 Africa which has yet come under our notice. (M. & P.) 



P. RHYSODES Melvill & Ponsonby. PI. 35, fig. 2. 



Shell deeply but narrowly umbilicated, depressed-convex, thin, 

 horny-brownish ; at the apex flattened. Whorls 5, compressed 

 toward the sutures, obliquely begirt with irregular, whitish, longitu- 

 dinal lirse ; last whorl hardly angled in the middle. Aperture 

 lunar-ovate ; peristome simple, thin, reflexed at the columellar mar- 

 gin. Alt. 4, diam. 6 mill. (If. & P.) 



South Africa (E. L. Layard.) 



Helix (Pella) rhysodes M. & P., Ann. Mag. N. H. (6) ix, p. 87, 

 t. 4, f. 2. 



Unfortunately Mr. Layard has no record of the precise habitat of 

 this little species, of which there are three specimens, two being 

 hardly full-grown, and consequently smaller than that selected for 

 the type. It falls under the H. bisculpta section of Pella, considered 

 typical in Tryon's Manual while it is there mentioned that the name 

 Sheldonia has been employed by Ancey (1887) for such species as 

 natalensis, tr otter iana, and cotyledonis. (If. & P.) 



H. rhysodes is thin, horny, fuscous, five-whorled, with white oblique 

 lirse longitudinally crossing, somewhat irregularly, there being here 

 and there small spaces left quite clear and free ; and the shell pre- 

 sents a wrinkled appearance in consequence. The umbilicus is deep, 



