Murex. MOLLUSCA. MURICIDyE. 355 



4. P. acuminata Turrited, acuminated, longitudinally ribbed, transverse- 



iy 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. 4.— London Clay. 



5. P. comma.— Turrited, beaked with acute transverse rising lines; whorls 

 smooth in the middle, with many short curved costse; 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 costse ; 

 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. T, 8 London Clay. 



8. P. priscus. — Fusiform, turrited, smooth ; base transversely sulcated ; 

 margins of the whorls striated ; lip wing-shaped. (Murex priscus, Brander, 

 f. 25, 44.)— Sower. Min. Conch, t. ccclxxxvi — London Clay. 



9. P. fusiformis.— Fusiform, elongated, rough, with deep transverse stria;, 

 and obscure longitudinal costse ; whorls subcarinated, with a striated band 

 upon their upper parts; aperture lanceolate.— Soiver. Min. Conch, t. ccclxxxvii. 

 f. 1 — London Clay. 



10. P. brevirostrum Turrited, acute, costated, transversely striated ; aper- 

 ture obovate, with a defined beak of ecmal length ; whorls ventricose. — Sower. 

 Min. Conch, t. ccclxxxvii. f. 2 — London Clay. 



11. P. Imvigata 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. — Oval, 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. t — 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. 

 £ 2 London Clay. 



8. M. frondosus — Ovate, oblong ; sutures in eight or nine rows, subspi- 

 nose, deeply plaited ; transverse ridges numerous, rough ; aperture obovate ; 

 canal straight. — Soiver. Min. Conch, t. ccccxvi. f. 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. £ 2. — Green Sand. 



5. M. tortuosus — Turrited, subfusiform, largely cancellated ; varices in 

 three tortuous rows, with two or three knobs between each ; whorls ventri- 

 cose ; beak contracted. — Sower. Min. Conch, t. ccccxxxiv. f. 2 — In Crag ? 



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