SMITH: LIST OF SOUTH AFRICAN MARINE MOLLUSCA. 383 
235. Sotarrum trocuorpEs, Deshayes. 
Solarium trochoides, Deshayes: Hanley in Sowerby’s Thes. Conch., 
vol. ili, p. 243, pl. 254, figs. 89, 90. 
Hab.—Durban (Burnup) ; Philippine Is. (Hanley). 
236. Rissora Crawrorpi, Smith. 
Rissoia Orawfordi, Smith: Journ. Conch., vol. x (1901), p. 107, pl. 1, 
fig. 13. 
Hab.—Algoa Bay, 20 fathoms (Crawford). 
237. Rrssomna (Irtvapra) annoutata (Dunker). 
Rissoina annulata, Dunker: Moll. Japon., 1860, p. 12, pl. i, fig. 12. 
Rissoina trochlearis, Gould: Otia, p. 144; Sowerby, Conch. Icon., 
vol. xx, pl xi, fig. 105. 
Hab.—Durban (Burnup); Japan (Dunker); China seas (Gouid) ; 
Bombay (Mus. Cuming); Hong Kong, Ceylon, Aden, Bombay, 
Andamans, Singapore, Arracan (Nevill Jk 
238. Rissorna crassa, Angas. 
Rissoina crassa, Angas: Proc. Zool. Soc., 1871, p. 17, pl. i, fig. 16. 
Hab.—Durban (Burnup). 
Some of the South African specimens are more distinctly spirally 
striated than others and also than the types from Port Jackson. The 
groove or excavation around the base of the body-whorl is also deeper 
and more evident than in the Australian shell. The size is rather 
variable, ranging from 8 to 5} mm. in length. 
239. Rissorya ampreva (Gould), 
Pyramidella ambigua, Gould: Proc. Bost. Soc. Nat. Hist., 1849, vol. ii, 
p. 118; Otia, p. 60. 
Rissoa ambigua, Gould: U.S. Explor. Exped., p. 217, atlas, figs. 
261-26le. 
Rissoina ambigua, Gould: Weinkauff, Conch. Cab., p. 25 (pl. ix, 
fig. 12). 
Hab. — Durban (Burnup); Paumotu Is. (Gould); China seas 
(Mus. Cuming). 
I do not consider the shell figured by Schwartz von Mohrenstern 
(Rissoiden, pl. iui, fig. 27) under the name of Rissocna ambigua to 
belong to Gould’s species, as it differs both in form and sculpture. 
The spiral strize are most conspicuous around the base of the body- 
whorl, as shown in Gould’s figure. 2. fortis, C. B. Adams (Schwartz, 
l.c., fig. 25), seems to be the same as the present species. 
240. AsstmrneEA Umtiaastana, Smith. 
Assiminea Umlaasiana, Smith: Journ. Conch., vol. x (1902), p. 248, 
pl. iv, fig. 3. 
Hab.—Mouth of Umlaas River, Natal (Burnup). 
241. Feneiia cerrrurna (Philippi). 
Rissoa cerithina, Philippi: Zeitsch. Malak., 1849, p. 33; Nevill, 
Hand List Moll., ui, p. 114 (as Fenella). 
Hab.—Natal (N evil) ; Aden (Philippi). 
