MUREX. ROCK-SHELL. 
83 
junction. A variety is sometimes found with ferruginous v 
marks or zones. 
On most rocky shores, v. v . 
3. Murex carinatus. Carinated Rock-shell. Tlg-gf- 
Pennant , pi. 80, and frontispiece to vol. iv.— Donovan, 
pi. 109— Laskey, jVern. Soc. i. pi. 8 . f. 9. 
Shell strong, oval, dull yellowish white: spires seven, 
the first very much intlated and covering more than half 
the shell, faintly striate transversely, with a few irregular 
longitudinal lines, giving them an imperfectly reticulate ■ 
appearance ; the upper part of each rather suddenly sloping 
to the next, causing them to be very distinctly defined by 
the line of separation; the four first with two distinct ele¬ 
vated ridges winding round the middle, and which gradu- 
ally disappear in the smaller volutions : aperture wide oval, 
ending in a slightly reflected open canal; inside pale yel¬ 
lowish-white ; the outer-lip very thin and slightly notched 
by the stria? on the back 5 inner-lip smooth, folding back on 
the body volution, rugged on the outside: length nearly 
three inches ; breadth one and a half. 
The description was taken from a fine specimen, in the 
cabinet of Mr. O'Kelly of Dublin, who found it at Portmar- 
nock, in Dublin bay. v. jn» 
4. Murex subantiquatus. Lesser smooth Rock-shell. 
Murex antiquus. Donovan, pi. 119. 
Shell oblong, pale brown, coarse, rugged and somewhat 
angular: spires eight, strongly striate transversely, and 
faintly in a longitudinal direction, with one or two strong 
undulate or slightly tubercled transverse ridges, which dis? 
appear on the terminal volutions : aperture oval ; the outer- 
lip dilated; pillar-lip a little reflected; inside livid white; 
the canal elongated : length nearly four inches ; breadth 
about two. 
In Scotland: very rare. 
5. Murex antiquus. Greater smooth Rock-shell. 
Lister, pi. 913. f. 4 —Da Casta, pi. 6. f. 4— Pennant, 
pi. 81 — Dorset Cat. pi. 1 7* f. 4. 
• - Mure* 
