Lg 
end ot the rostrum, eight moderately raised, with interstices 
of intermediate width; concentric growth lines distinct, 
rather irregular, here and there slightly lamellose, especially 
on the posterior side. Posterior dorsal margin very slightly 
incurved ; anterior short, obtusely angled, truncated ; anterior 
lateral margin rather convex ; ventral rounded, then obliquely 
raised towards the posterior side; rostrum rather short, 
wedge shaped; umbones rounded, closely approximating, 
situated nearer to the anterior than to the posterior side of 
the shell; dorsal area scarcely defined. 
Measurement :—Anterior to posterior, 13; umbones to 
ventral margin, 8; thickness, 64 millim. 
Hab. :—Cape Natal, N. by E., 24 miles; 440 fathoms. 
The species is somewhat similar to C. Alcocki, Smith, but 
it has a shorter rostrum, and differs from it in other respects. 
Evratum. 
Mollusca Vol. II., page 224 ; delete line 2, and put a comma 
at the end of line 1 (after the word “‘ above ”’). 
The line to be deleted forms part of the description of the 
second species on page 222, and has unaccountably been 
repeated as above. 
| PUBLISHED I5TH NOVEMBER, 1904. | 
