148 Annals of the South African Museum. 



1892 Helix (Pella) tuguriolum, M. & P., A.M.N.H. ix. p. 88. pi. 5, 



f. 5. D.F. 



1893 Phasis (Trachycystis) tuguriolum, M. & P., Pilsb., Man. of 



Conch, viii. p. 145. pi. 35, f. 1. D.F. 

 1898 Pella tollini, Alb., Sfcur., S.A. Moll. pp. 39, 40. N. 



Originals of tollini in University Museum of Zoology, Cambridge ; 

 types of afra and tuguriolum in British Museum ; roseri in Stuttgart 

 Museum. 



Hab. CAPE OF GOOD HOPE (afra, McGillivray, fide Pfeiffer). 

 Table Mountain (tollini, Tollin ; Layard). Stellenbosch (Purcell). 

 Kalk Bay ; Simonstown ; Kommetje ; Houw Hoek ; Caledon (Con- 

 nolly). Gordon's Bay ; Hermanus (Lightfoot). Bredasdorp (Layard). 

 Swellendam District (roseri, Krauss). 



Helix afra, Pfr., is identical with tollini, Alb., and must yield 

 priority to the latter, which was the earliest name under which the 

 species was either described or figured. The type set of tuguriolum, 

 labelled "South Africa" (coll. Layard), are also immature, rather 

 pale examples of the same species. 



The type, and only authentic example, of roseri, Krauss, is a semi- 

 bleached shell, in form exactly resembling immature tollini. Its 

 colour is paler, and the surface, being considerably worn, shows 

 only the cross striation of tollini and not the fainter spiral sculpture. 

 The columellar fold is slightly broken, which gives a more open 

 appearance to the umbilical region than is usual in tollini, but the 

 underside of the shell and the peculiar shape of the peristome agree 

 with that species. After careful consideration, I think I may safely 

 declare them to be one and the same. 



279. TRACHYCYSTIS TRICHOSTIBOMA (Melv. & Pons.). 



1892 Helix (Pella) trichosteiroma, M. & P., A.M.N.H. ix. p. 84. pi. 4, 



f. 9. D.F. 



1893 strobilodes, M.& P., A.M.N.H. xi. p.!9.pl.3,f. 1. D.F. 

 Phasis (Trachycystis) strobilodes, M. & P., Pilsb., Man. of Conch. 



viii. p. 147. pi. 43, . 62. D.F. 

 ,, ,, trichosteiroma, M. & P., Pilsb., Man. of 



Conch, viii. p. 143. pi. 35, f. 3. D.F. 



1898 Trachycystis tricliostiroma, M. & P., Proc. Mai. Soc. iii. p. 174. 

 Types in British Museum. 



Hab. CAPE OP GOOD HOPE. Port Elizabeth (fide M. & P.). Thar- 

 field (Miss Bowker). 



The type of strobilodes is badly figured, but agrees with the original 

 description. It is quite inseparable from trichostiroma. 



