296 APPENDIX. 



ashy. Whorls 4 (the last rapidly increasing), impressed at the 

 sutures, gradatulate. Aperture oval ; peristome thin, simple. 

 Alt. 2, diam. 1J mill. (M. &. P.) 



Somerset East, South Africa. 



Helix (Patula) somersetensis M. & P., Ann. Mag., N. H. (6) xi, 

 p. 19, t. 3, f. 2 (Jan., 1893). 



A shell of simple character, with a superficial resemblance to H. 

 (Vallonia) pulchella Mull. In the collection of E. L. Layard, 

 Esq. Two specimens. (31. & P.) 



Vol. Ill, p. 35, for H. aulocospira, read .0. aulacospira. 



Vol. Ill, p. 46, H. arcuata Pfr. is a Vitrinoconus, according to 

 Mlldff. 



Vol. Ill, p. 52, H. hypocrita Dohrn. is said by Wollaston to be a 

 synonym of H. (Discus) pusilla Lowe, p. 31. 



Genus TKOCHOMOKPHA Alb. 



TROCHOMORPHA NIGRANS var. CORNEA Hedley. 



Smaller than the type, horn-colored. 

 Alt. 6, greater diam. 16, lesser 14 mill. 



Sudest I., Louisiades. Type in Queensland Mus. (Hedley, P. L. 

 S. N. S. W. (2) vi, p. 79). 



Genus PLECTOPYLIS. 



P. FULTONI Godwin-Austen. See Vol. IX for figures. 



Shell sinistral, keeled, widely umbilicated, subglobosely discoidal ; 

 color pale ochraceous ; sculpture a fine close flaxy epidermal stria- 

 tion, with four lines of long hairs arranged upon the periphery of 

 the body whorl-two closely adjacent and running with keel above, 

 one around the umbilical depression, and one intermediate. Spire 

 depressedly convex, suture well marked, apex rounded. Whorls 

 seven, closely wound, side of the last very oblique below and flat- 

 tened, becoming rounder near the aperture, where it descends very 

 slightly. Aperture wide, semiovate, very oblique, and slightly 

 reflected on the margin. Peristome not thickened, continuous over 

 the parietal side. The internal barriers are not visible on looking 

 into the aperture. The parietal vertical lamina is simple, with only 

 a slight horizontal support above on the posterior side ; a very 

 short double knobbed horizontal parietal lamella is situated imme- 



