4 
Length, 10 ; width, 8 ; thickness, 6 millim. 
Hab. :—Lat. 34°97’S., Long. -25°'42' 30° Ha; “depth; 56 
fathoms ; bottom, rock (one complete shell). 
Umhloti River Mouth, N.W.4W., 154 miles; depth, roo. 
fathoms (one valve). 
This species is allied to C. glandula, Totten, but the shell is 
of a thinner substance, and the striz are much finer. 

Fam. Arcide. 
ARCA (SCAPHARCA) AFRICANA, Nn. sp. (Plate VI., fig. 4). Shell 
transversely oblong, slightly inequivalve, whitish, covered with 
a light brown periostracum, which is here and there bristly 
between the ribs ; anterior margin angular above, then rounded’ 
and obliquely receding towards the ventral margin, posterior 
slightly auriculate above, and roundly produced at the end. 
Ribs 25 in number prominent, biangular, more than half of 
those on the right valve crenulated with oblong transverse: 
nodules, only the posterior ones being nearly smooth, while on 
the left valve the majority are smooth, only the anterior ones 
being nodulous; interstices smooth. Umbones prominent, 
rounded, incurved, separated by the lgamental area, and 
situated rather near the anterior end of the shell. Ligamental 
area rather broad, flattened, short and angular in front, elon- 
gately produced behind. Interior of the valves white, strongly 
denticulate at the margin. Hinge line long, nearly straight ;. 
teeth numerous, anterior ones narrow close and oblique, pos-. 
terior shorter and thicker. 
Length 18; width 25; thickness 15 millim. 
Hab. :—Tugela River mouth, N. by W., 18 miles; depth, 
46 to 55 fathoms. Bottom, mud. 
The shell is rather like A. ferruginea, Reeve, from which 
it differs chiefly in form, and particularly in the obliquity of 
the anterior margin. 
PECTUNCULUS CASTANEUS, Lamarck (Reeve, Couch. Icon. 
Pectunculus, fig. 32). Table Mountain N. 79° E., 40 miles ;: 
250 fathoms (odd valves). 
Fam. Nuculide. 
NucuLana BELcHERtI, Hinds* (Plate VI., fig 7). Although: 
it is not new as South African, I mention here this fine charac- 
teristic species. It has hitherto been practically unknown 
*Nucula Belcheri, Hinds, Proc. Zool. Soc., 1843. Nucilana, Link, 1807=: 
Leda, Schumacher, 1817. 
