2 
ee) 
CHYLAMS HUMILIS, n.sp. (Plate VI., fig. 3). Shell rather 
higher than broad, equivalve, equilateral, thin, compressed, 
reddish orange colour, with four yellowish rays ; radiating rib- 
lets about 30 in number (with here and there a small inter- 
vening ridge), slightly imbricated, the lateral ones more dis- 
tinctly so, the interstices crossed by sharp lamelle. Auricles 
very unequal; the anterior broad, with about eight prickly 
ridges, the posterior small, ridges almost obsolete. Left valve 
nearly flat; right rather convex; sculpture similar in both 
valves. 
Height, 16 ; width, 15 ; depth, 5 millim. 
Hab. :—Great Fish Point, N.W., 9 miles, depth 51 fathoms ; 
bottom, sand and shells (one specimen only). Cape St. Blaize, 
N. by E.1 E., 65 miles, depth go fathoms (a single specimen). 
This little species appears to be very rare, only one specimen 
having been taken at each of the above stations. It presents 
no particularly striking characters, resembling somewhat in 
form and aspect the Mediterranean C. Bruei, Payr., the ribs 
being closer, more rounded, and not longitudinally lirate. 
Fam. Aviculide. 
PINNA SQUAMIFERA, Sowerby. I mention this species here 
although it has already been recorded as South African by 
Me iE. Ay Smith (Proc. Malac:-Soc.iVal. V., p. 304); because 
the largest specimen exceeds considerably in size the largest 
he mentions. The shell taken in Mossel Bay measures 143 
inches in length. 
Fam. Mytilide. 
MopDIoLA RHOMBOIDEA, Hanley (Reeve, Conch, Icon. Modiola, 
fig. 28). 
South Head, Tugela River, N. by W., 42 miles, 25 fathoms ; 
bottom, black mud. 
CRENELLA STRIATISSIMA, n. sp. (Plate VI., fig. x). Shell 
obliquely oval, thin, inflated, pale straw-colour; the whole 
surface of the valves longitudinally very densely striated, 
strie minutely granulose, here and there slightly divaricating ; 
umbones minute, incurved. Interior silvery, margin minutely 
crenulated. Hinge narrow; in place of the four cardinal teeth 
usual in the genus, only a very slight rounded projection ; 
anterior crenulated. Ligament long, rather thin, horny. 
