MUREX. ROCK-SHELL . 
93 
much contracted at the canal, which is short; the outer-lip 
thickened by a rib, with the margin thin : length about a 
quarter of an inch; breadth hardly an eighth. 
Western coasts, and Dublin bay, on Fuci. v. v. 
13. Hu rex proximus. Proximate Rock-shell, 
Montagu, pi. 30. f. 8. 
Shell thick, white, moderately pointed : spires six, ra¬ 
ther abrupt at the tops, rounded and well defined, with 
about eleven strong libs, not striate transversely: aperture 
oval-oblong; the canal short and rather spreading at the 
end ; outer-lip extremely broad and reflected: length 
nearly half un inch. 
Near Dunbar; very rare. 
» 14. Murex Turricula. Turret Rock-shell, 
Montagu, pi. 9. f. 1 —Dorset Cat. pi. 14. f. 15. 
Murex angulatus. Donovan , pi. 156. 
Shell tapering to a very fine point, clear white, yellowish, 
or with a rosy tinge, and rather glossy: spires eight or 
nine, with numerous longitudinal ribs, crossed by very fine 
transverse strife; the volutions strongly defined, and flat¬ 
tened at their junctures on the top, giving them a remark¬ 
ably turreted appearance: aperture oblong, ending in a 
broad canal : the outer-lip a little angular on the upper 
part ; pillar-lip smooth : length three quarters of an inch ; 
breadth a quarter. 
Western coasts, and Dublin bay. v. v . 
15. Murex rufus. Rufous Rock-shell, 
Montagu, 263. 
Shell oblong, taper, rufous-brown or chesnut: spires six, 
or seven, with about twelve longitudinal ribs, prominent in 
the middle, and very faintly striate across : aperture ob¬ 
long, narrow, .ending in a short canal ; the outcr-lip thick¬ 
ened by a rib; inner-lip smooth, much turned back, and 
forming a very small indenture at the end of the canal: 
length three tenths of an inch ; breadth an eighth. 
In old shells the transverse strise are obliterated, so as to 
make the interstices of the ribs appear quite smooth. 
Western coasts, and Dublin bay. v. m, 
16. Murex; 
