436 Mr. W. II. Benson on some 7iew Land Shells. 



weathered, is deficient in the upper whorls, and is shghtly 

 damaged on the columellar lip ; but the characters of the aper- 

 ture and of the last whorl are too peculiar to allow of its being 

 confounded with any other species. The superior parietal plait 

 and the upper palatal one run almost contiguously parallel for 

 some distance into the aperture, forming an imperfect tube which 

 opens at the top of the aperture. 



The rather variable sinistrorse shell (perhaps including P. ca- 

 pensis, Kr.) which I found on the shores of Simon^s and Hout Bays, 

 and which I referred in a former paper to Pupa pottebergensiSj 

 Krauss, was found abundantly on the same Point by Mr. Layard, 

 together with Helix Menkeana, Pfr., and the true Helix Lucana of 

 Miiller. A small variety of the latter shell, from Caledon, I was 

 at first inclined to describe as a new species. It differs in having 

 the umbilicus almost rimate, and shows a passage towards a small 

 variety of Helix Alexandri, Gray, found, in Namaqua Land, with 

 several varieties of H. globulus. The same modification of the 

 umbilicus, in the species dwelling more to the eastward, is ob- 

 servable in a specimen of Helix Menkeana sent to me by Prof. 

 Albers, from Elim, as compared with Mr. Layard's specimen, 

 and with the larger inflated variety which I found on the sand- 

 hills in Hout Bay. Pupa Kurri, Krauss, noted by its describer 

 as a Zwellendam species, has also been forwarded from the 

 George District. 



Helix Charyhdis, nobis, n. s. • . 

 Testa subaperte umbilicata, discoidea, utrinque concava, confertim 



radiato-costulata, costulis alternis acutis salientibus, cornea ; an- 

 , jjfractibus 4^ convexis, ultimo angusto, caeteros dominante, superne 



subangulato, subtus convexo ; apertura anguste lunari, altiori quam 

 ; lata, utrinque testam superante ; peristomate tenui, acuto, margine 

 "' columellari expansiusculo, umbilico profunde perspectivo. 

 Diam. major 5|-, minor A\, axis 2\ mill. Long, apart. 3, lat. 2 mill. 

 Hab. ad Promontorium Bonee Spei. 



Mr. Layard found this species rarely, in company with H. per- 

 plicata, nobis, at the Waterfall, near the highest blockhouse, on 

 the Table Mountain towards Rondebosch. Only three specimens 

 were taken. The specimen described is in bad order, especially 

 about the aperture, the characters of which may be open to cor- 

 rection on the receipt of a better specimen. 



Helix Tollini, Albers. 

 Testa obtecte subperforata, globoso-depressa, tenuiter striata, sub lente 

 striis exilissimis spiralibus utrinque decussata, nitidula, sericea, 

 fusco-cornea, translucente ; spira vix elevata, apice prominulo, ob- 

 tusiusculo, sutura impressa, submarginata ; aufractibus 5 con- 

 vexiusculis, ultimo rotundato, subinflato ; apertura verticali, rotun- 

 dato-lunata ; peristomate recto, tenui ; margine columellari subito 



