78 HELIX-PATULA. 



spot, or (3) streaked, and having a dark band just below the periph- 

 ery. Surface nearly smooth. 



Spire lovv-conoidal, apex obtuse ; whorls 5, very slightly convex, 

 the last not descending in front, narrowly excavated at the axis. 

 Aperture oblique, lunate, white and dark within ; peristome thin 

 and simple, very shortly reflexed at the columellar insertion. 



Alt. 7, diam. 10 mill. 



Norfolk Island. 



H.floseulus Cox, P. Z. S. 1865, p. 695 ; Journ. de Conchyl. 1866, 

 p. 48. PFR., Monogr. v, p. 128. 



This species has much resemblance in form and color to H. kirn 

 Gray, of New Zealand ; and it probably belongs to the same genus, 

 although it may prove to be a Nanina. 



Genus PATULA (vol. Ill, p. 19). 



P. VIRIDESCENS Melvill & Ponsonby. PI. 30, fig. 32. 



Shell profoundly, broadly umbilicated, thin, flat depressed, whit- 

 ish, covered with a corneous cuticle. Whorls 3, rapidly increasing, 

 smooth, shining; the last whorl large, subeffuse. Aperture lunar- 

 ovate, oblique ; peristome simple, thin. Alt. 2, diam. 5 mill. 

 (M. & P.) 



Pretoria, Transvaal. 



H. (Patula) viridescens M. & P., Ann. and Mag. N. H. (6), viii, 

 p. 238; 1. e., vol. ix, t. 4, f. 1. 



A small shell with olivaceous epidermis and of simple character. 



P. SPURCA Sowerby. PL 36, figs. 1, 2. 



Shell narrowly umbilicated, suborbicular, thin, whitish variega- 

 ted with rufous, hardly shining; spire little elevated, obtuse at 

 apex; whorls 5, a little convex, regularly and slowly increasing, 

 striated with oblique, flexuous, close growth lines; last whorl 

 rounded at the periphery, hardly descending in front; aperture 

 wide-lunate, simple, scarcely toothed or li rate; peristome thin, the 

 columellar margin slightly expanded and reflexed. 



Alt. Sit, greater diam. 5, lesser 4s mill.; aperture 2i long, 1 

 wide. (Smith.) 



Siigarloaf Hill and Quarry, St. Helena (extinct). 



Helix spurca SOWB., in appendix to Darwin's Geol. Obs. on 

 the Volcanic Islands, etc., p. 157. FORBES, Journ. Geol. Soc. 



