PELECYPODA. a1 
Amplustve thalassiaychi, Martini, &c.—Durban. A species of 
wide geographical distribution. 
Atys ELoncaTA, A. Adams (Bulla), Sow., Thes. Conch., 
vol. ii., pl. 125, f. 121.—Durban. Widely distributed in the 
Indian and Pacific Oceans. 
CYLINDROBULLA scuLpTA, G. & H. Nevill, Journ. Asiatic 
Soc., p. 2, No. 2, 1869, p. 68, pl. 13, fig. 3.—Hab., Port 
Elizabeth. 
VOLVATELLA LAGUNCULA, Sowerby (pl. 6, fig. 17\, Journa 
of Conchology, vol. vii., p. 1o., 1894.—Port Elizabeth. 
PELECYPODA. 
SoLEN corNEUS, Lamarck, Sew., Conch. Icon. (Solem), 
fig. 1¢.—Durban. 
SoLeNn Stoanel, Gray, Sow., Conch. Icon., 1, 10. —Durban. 
PaNDOoRA DISsIMILIs, Sowerby (pl. 6, fig. 33), Journal of 
Conchology, vol. vii., p. 11, April, 1894.—Sea Point, Cape 
Town. 
BASTEROTIA OBTUSA, Sowerby (pl. 6, fig. 27), Journal of 
Conchology, vol. vi., p. 11, April, 18394.—Durban. 
BASTEROTIA TRICOSTALIS, Sowerby, n. sp. (pl. 8, 
figs. Iq, 15.— Testa equivalvis, incequilateralis, pallide 
straminea, elongato-subtrigona, crassiuscula, antice brevius- 
cula, rotundata, postice longior, oblique, declivis, angulata, ad 
angulum acute carinata, irregulariter rugosa; area postica 
leviter concava, valde tricostalis; umbones acuti, approximati, 
lunula parva ; cardo in utraque valva dentem unicum leviter 
excurvatum munitus. 
Antero-post 12, umbono marg. 7 millim. 
Hab. Durban (Burnup). 
This second species of Basteyvotia, which I have described 
from South Africa, is more like the type of the genus than the 
first (B. obtusa). It hasa prominent keel ridge at the posterior 
angle, behind which the somewhat concave area is furnished 
with two additional keels or ribs. 
Mactra ACHATINA, Chemnitz, Conch. Cab. vol. ii., p. 218, 
fig. 1957.—Reeve, Conch. Icon. (Macira), fig. 51. 
Mactra #QUISULCATA, Sowerby (pl. 8, fig. 26), Journal 
of Conchology, vol. vii., p. £2.—Durban. 
/p a4 
