COCCULINA. 137 



C. GALEOLA Jeffreys. PL 46, fig. 7. 



Shell resembling an ancient helmet or casque, strong and thick 

 for its size, opaque and lustreless ; sculpture : numerous and close-set 

 fine and minute radiating striae, which covers the whole of the ex- 

 terior ; there are also occasional and well marked lines of growth, 

 which are somewhat crowded towards the margin ; color whitish 

 beak small, incurved and pointed, placed very near the front mar- 

 gin and almost overhanging it ; margin entire, compressed and form- 

 ing a rim on the front half; inside smooth ; scars as in Lepeta caeca. 

 (Jeffreys.} Length "225, breadth *175 inch. 



A single specimen. 



If the peculiar shape of this shell may be regarded as a generic 

 character, I would suggest for it the name DALLIA, as a mark of re- 

 spect for the great malacologist, Mr. Dall, who has examined my 

 specimen. He says it is " not an Acmeid," and would place it near 

 Capulus ; but he qualifies his remark by saying that " it is barely 

 possible it may be a Cocculina." He is an unquestionably good 

 authority on this as well as other departments of the mollusca and 

 I venture with hesitation to differ from him. (Jeffreys.') 



Northeast Atlantic. 



Tectura galeola, JEFFR. P. Z. S. 1882, p. 672, t. 50, f. 5. 



A species of very doubtful generic position. 



C. ANGULATA Watson. PI. 25, figs. 13, 14, 15. 



Shell small, thinnish, with a strongish membranaceous epidermis, 

 compressedly patelliform, oval, with a long convex anterior 

 slope, a short slightly concave posterior slope, while the compressed 

 side slopes are very steep and very slightly convex ; there is a blunt 

 reverted tip, but no embryonic shell ; the surface is rayed by fine 

 smooth, rounded, unequal riblets. Sculpture : longitudinals from 

 the top proceed radiating riblets, which are regular, delicate, well 

 rounded, raised and unequal, a few being a little stronger than the 

 rest, which, to the number of two to four, closely occupy the inter- 

 vals. Spirals these are microscopic, rounded, close-set, and very 

 faint. Colour: under the strongish, hard, membranaceous, pale 

 brownish epidermis the shell is porcellanous white. Apex : the 

 embryonic apex has been removed, and a scarred plug at the very 

 top of the back slope fills the hole it left. Margin thin and broken, 

 and overlapped by the epidermis. Inside porcellanous, delicately 

 fluted, open to the apex, with a strongish horse-shoe scar, with two 



