65 
Anim. Angl. Tab. 3, Fig. 4, who says it is found, but rarely, on the 
Scarborough coast. 
The shell represented Plate Y. Fig. 22, is a shell from the same 
cliff, of very curious structure ; it appears to be M. Erinaceus, Linn. 
Its specific characters are, an oblong ovate form ; the spine formed 
by five or six angular turns ; rather obtuse longitudinal ribs, appear- 
ing as if interwoven with transverse, close, squamose, cord-like 
ridges ; the columella slightly umbilicated, with a very small tooth - 
like projection ; and the right lip rather denticulated. 
Murex tubifer, Lam. Murex pungens, Brand. Foss. haut. Fig. 81, 
82. An oval shell, terminating in a point at each end, and furnished 
with, generally, four ridges, beset with hollow, bent, and pointed 
spines, and with short tubes ; and not, as they appear to be, broken 
spines, disposed between the spinous ridges. The fistulous spines and 
short tubes with which this shell is beset, render it very remarkable, 
and distinguish it from every other shell. It is found both in Hamp- 
shire and Grignon. A very fine specimen of this shell is represented 
Plate Y. Fig. 15. It is said by Bruguiere, that the recent analogue of 
this extraordinary shell was in the late Dr. Hunter’s Museum. 
In this genus must be also placed the shell which is so well known 
by the appellation of the Essex reversed whelk, the twirls passing from 
the right hand to the left. This shell is figured by Lister, Histor. 
Conchy l. Tab. 950, Fig. 44, h and c ; and by Dale, History of Harwich, 
Plate X. Fig. 6 ; and is considered as a murex, M. contrarius, by 
Linneeus, System. Natur. Tome i. p. vi. p. 3564. Considerable variety 
occurs in the surface of these shells : some are strongly marked with 
longitudinal linear markings, and are without any transverse markings ; 
whilst in others transverse linear markings, single or double, are 
plainly seen, and no longitudinal rugae exist. In some few I have 
observed these markings so determined and distinct, as almost to 
authorize the regarding of them as specific characters. Plate YI. 
Fig. 6, represents one of these shells, of rather a small size. 
VOL. III. K 
