356 MOLLUSC A. MURICID^. Typhis. 



Gen. typhis. — Oval, aperture suborbicular, canal shorty 

 covered ; whorls with numerous tubular pervious pro- 

 cesses. 



1. T. Jisiulosns. — Oblong, varicose; each varix foliated and produced above 

 in a recurved tube ; aperture obovate, entire ; beak nearly straight, closed. 

 — (Murex pungens, Brander, f. 82.) — M. fist. Sower. ]\Iin. Conch, t. clxxxix. 

 f, 1, 2 — London Clay. 



2. T. tuUfer — Ovate, with four rows of erect tubes alternating with four 

 solitary tubes upon each whorl ; aperture obovate, entire ; beak arched, 

 closed.— (INIurex pungens, Brander, f. 81.) — T. lubifer, Park, Org. Rem. iii. 

 65. t. V. £ \b.— London Clay. 



Gen. LXXXL TRITON.— Ovate, oblong; canal produced, 

 subascending, or bent to the left ; ribs alternate or remote, 

 not continuous on the whorls. 



351. T. ey'inaceus. — Whorls eight, with seven rugose, longi- 

 tudinal ribs crossed by strong spiral strise. 



Murex er. Penn. Brit. Zool. iv. 123. t. Ixxvi. f. 95. Don. Brit. Shells, 

 t. XXXV. Mont. Test. Brit. 259. — Rocky shores. 

 Length nearly 2 inches, breadth 1 inch ; brown ; strong ; whorls angular, 

 sloping abruptly at the junctions, with imbricated arched scales ; aperture 

 oval ; canal subtubular ; outer-lip striated internally, pillar-lip smooth. 



EXTINCT SPECIES. 



1. T. tuberosus.— Ovate, pointed, transverse.Iy striated, with many blunt 

 short costae upon each whorl ; base convex — Murex tub. Sower. Min. Conch, 

 t. ccxxix. f. 1. — London Clay. 



2. T. minax Short, transversely striated ; spire tuberculated, acute ; last 



whorl ventricose, with two rows of tubercles; the upper ones spinifbrm, fur- 

 rowed ; base sulcated ; beak curved. — Murex-minax (Brander, f. 62.) Sower. 

 ]Min. Conch, t. ccxxix. f. 2. 



3. T. cristatus Ovate, transversely striated ; longitudinal costae promi- 

 nent, sharp, with three large plaits in each, the upper plait subspiniform ; 

 beak curved.— Murex crist. Sower. Min. Conch, t. ccxx. f. 1, 2. — London Clay. 



4. T. coronalm. — -Obloi'g, transversely furrowed ; costse numerous, sharp ; 

 upper part of the volutions concave, bounded by a sharp ridge and a strong 

 spine upon each of the costae. Murex cor — Sower. Min. Conch, t. xxiii. f. 3. 

 — London Clay. 



5. T. argutus Ovate, pointed, costated, spirally striated ; costse knotted ; 



striae many, elevated, several of them large ; varices few ; whorls inflated be- 

 yond each" varix ; aperture toothed ; beak ascending — Murex varg. (Brand- 

 er, f. 13.) Sower. Min. Conch, t. cccxliv — London Clay. 



6. T. alveolalus Ovate acuminated ; surface divided into square cells by 



many acute sutures that decussate eight or ten prominent carinte ; whoris 

 ventricose, flattened above ; aperture oval ; the outer lip toothed within — 

 Murex alv. Sower. iMin. Conch, t. ccccxi. f. 2 — In Crag. 



7. T. defossus Ovate acuminated, smooth ; whorls ventricose, bearing 



many obtuse carinae ; sutures numerous, acute, linear ; aperture elongated, 

 with many lamelUform teeth within its outer lip.— Buccinum def. PUk. Luin- 



