MuREx. MOLLUSCA. MURICIDtE. {355 



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

 ly striated; vrhorls 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 costce; aperture ovate, cana- 

 liculated ; beak slightly curved. — Sower. Min. Conch, t. cxlvi. f. 5 London 



Clay. 



6. P. semJco^ow.— Turrited, elongated, striated, with many curved costce ; 

 whorls swelled with a granulated margin, base conical, decussated ; aperture 

 ovate, beaked. — Sower. Miii. Conch, t. cxlvi. f. 6. — London Clay. 



7. P. colmi — 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. priseus. — Fusiform, turrited, smooth ; base transversely sulcated ; 

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

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



9. "P. fusiformis. — Fusiform, elongated, rough, with deep transverse striae, 

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

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

 f. 1. — London Clay. 



10. P. brevirostrum. — Turrited, acute, costated, ti'ansversely striated ; aper- 

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

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



11. V. IcBvigala — Turrited, nearly smooth ; spire subcostated ; whorls ven- 

 tricose, concave above ; aperture elongated ; beak produced.— iS'ower. 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 ; apei'ture 

 obovate ; canal reciirved — {Brander, f. 77, 78, 79-) — M- tricarinatus, Smver. 

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

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

 canal straight.— A'oewr. Min. Conch, t. ccccxvi. f. X— London Clay. 



4. M. cafcar.— 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 Gh-een 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 ? 



z2 



