Murex. 
MOLLUSCA. MURICIDJE. 
355 
4. P. acuminata Turrited, acuminated, longitudinally ribbed, transverse- 
ly striated; whorls above, concave, edge fimbriated ; below, sulcato-striated ; 
aperture elongated, canaliculated, one-third the length of the shell ; beak 
broad Sower. Min. Conch, t. cxlvi. f. A.^London Clay. 
5. P. comma. — Turrited, beaked with acute transverse rising lines; whorls 
smooth in the middle, with many short curved cost®; aperture ovate, cana- 
liculated ; beak slightly curved. — Sower. Min. Conch, t. cxlvi. f. 5 . — London 
Clay. 
6. P. semicolon Turrited, elongated, striated, with many curved costae ; 
whorls swelled with a granulated margin, base conical, decussated ; aperture 
ovate, beaked. — Sower. Min. Conch, t. cxlvi. f. 6 . — London Clay. 
7. P. colon — Fusiform, striated ; whorls concave above, with a crenulated 
margin below, with many rugged transverse ridges and small short longitu- 
dinal undulations ; base conical, aperture elongated — Sower. Min. Conch, 
t. cxlvi. f. 7? 8 — London Clay. 
8. P. priscus. — Fusiform, turrited, smooth ; base transversely sulcated ; 
margins of the whorls striated ; lip wing-shaped. (Murex priscus, Brander., 
25, 44.) — Sower. Min. Conch, t. ccclxxxvi — London Clay. 
9. V. fusiformis. — Fusiform, elongated, rough, with deep transverse striae, 
and obscure longitudinal costae ; whorls subcarinated, with a striated band 
upon their upper parts; aperture lanceolate.— Min. Conch, t. ccclxxxvii. 
f. 1 . — London Clay. 
1 0. P. brevirostrum — Turrited, acute, costated, transversely striated ; aper- 
ture obovate, with a defined beak of equal length ; whorls ventricose. — Sower. 
Min. Conch, t. ccclxxxvii. f. 2 London Clay. 
1 1. P^ laevigata — Turrited, nearly smooth ; spire subcostated ; whorls ven- 
tricose, concave above ; aperture elongated ; beak produced. — Sower. Min. 
Conch, t. ccclxxxvii. f. 3. — London Clay. 
Gen. murex.— O val, aperture suborbicular, canal produ- 
ced ; ribs tubercular or spinose, three or more united ob- 
liquely on different whorls. 
1. M. asper — Ovate, oblong, transversely striated ; sutures in three rows, 
foliaceous, dentated, bearing one spine upon the upper part of each ; aperture 
obovate; canal recurved — {Brander, f. 77, 78, 79-) — M- tricarinatus. Sower. 
Min. Conch, t. ccccxvi. f. 1 — London Clay. 
2. M. bispinosus — Ovate, elongated, with three rows of foliaceous sutures 
and two or three transverse ridges ; sutures simple, bearing two concave 
spines to each whorl ; canal nearly straight. — Sower. Min. Conch, t. ccccxvi. 
f. 2 . — London Clay. 
8. lA. frondosus — Ovate, oblong; sutures in eight or nine rows, subspi- 
nose, deeply plaited ; transverse ridges numerous, rough ; aperture obovate ; 
canal straight. — Sower. Min. Conch, t. ccccxvi. fl 3. — London Clay. 
4. M. calcar. — Ovato-acuminated, transversely striated, costated; last whorl 
bicarinated ; each suture supports two or three long sharp spines ; aperture 
round, with a long canal — Sower. Min. Conch, t. ccccx. f. 2 . — Green Sand. 
5. M. tortuosus — Turrited, subfusiform, largely cancellated ; varices in 
three tortuous roAvs, with two or three knobs between each ; whorls ventri- 
cose ; beak contracted. — Sower. Min. Conch, t. ccccxxxiA^ f. 2. — In Crag ? 
