38 MARINE SHELLS OF SOUTH AFRICA. 
Rissoa NIGRA, Krauss, Sudafr. Moll. p. 86, pl. 5, fig. 19. 
—Algoa Bay and Table Bay (Krauss). 
Rissoa (ALVANIA) ARGENTEA, Sowerby, noy. sp., pl. 11, 
fig. 40.—Testa acuminato-ovata, imperforata, argenteo-nitens, 
pellucida ; spira acutiuscula, gradata; anfractus 6, convexi, 
liris approximatis, leviter granulatis (in anfr. penult. 4-5, in 
anfr. ult. cire. 8), sculptiy superne longitudinaliter plicati ; 
anfractus ultimus leviter inflatus ; apertura ovata; peristoma 
simplex ; columella arcuata. 
Long. 2, diam. maj. 13 mill. 
Hab. Port Elizabeth. 
A beautitul little shining silvery shell, not regularly 
latticed like R. fenestrata, but with the spiral ridges much 
more prominent than the longitudinal plaits, which are nu- 
merous and visible only on the upper half of the whorls. 
Rissoa (CINGULA) CAPENSIS, Sowerby, nov. sp., pl. 2, fig. 
41.—Testa ovata, anguste perforata, fulvo-cornea, zona lata 
fusca cincta; spira breviter turrita, acutiuscula, sutura pro- 
funda; anfractus 53, leves, convexi; anfractus ultimus 
spiram paulo superans, leviter inflatus ; apertura ovata, infra 
angulata ; peristoma simplex. 
Long. 2, diam. maj. 14 millim. 
Hab. Port Elizabeth. 
A smooth horny umbilicated species with a single broad 
brown band. 
Ca&cUM GLABRUM, Montagu, Sowb. Hl. Index Brit. 
Shells, pl. 15, fig. 7.—Port, Elizabeth. 
TURRITELLA CARINIFERA, Lamarck, Reeve, Conch. Icon. 
sp. 12—Natal, Table Bay and Port Elizabeth. 
TURRITELLA BACILLUM, Kiener, Reeve, Conch. Icon. sp. 7. 
—Natal Bay (Krauss). This species is widely distributed in 
the Indian and Pacifie Oceans. I have not met with it among 
South African shells. 
TURRITELLA CAPENSIS, Krauss, Sudafr. Moll. p. 106, pl. 6, 
fig. 8.—Table Bay (Krauss). 
TURRITELLA KNYSNAENSIS, Arauss, Sudafr. Moll. p. 106, 
pl. 6, fig. 9; Knysna (Krauss).—Port Elizabeth (Crawford). 
TURRITELLA EXCAVATA, Sowerby, Proc. Zool. Soe. 1870, 
p- 252, pl. 21, fig. 3.—Aghulhas Bank. 
