356 MOLLUSC A. MURICIDiE. Typhis. 



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

 covered ; whorls with numerous tubular pervious pro- 

 cesses. 



1. T. fistulosus. — 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. Min. Conch, t. clxxxix. 

 f. 1, 2. — London Clay. 



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

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

 closed — (Murex pungens, Brander, f. 81.) — T. tubifer, Park, Org. Rem. iii. 

 (>5. t. v. f. 15. — London Clay. 



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

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

 not continuous on the whorls. 



351. T. erinaceus. — Whorls eight, with seven rugose, longi- 

 tudinal ribs crossed by strong spiral striae. 



Murex er. Perm. Brit. Zool. iv. 123. t. lxxvi. 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, transversely striated, with many blunt 

 short costa? 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 spiniform, fur- 

 rowed ; base sulcated ; beak curved. — Murex-minax (Brander, f. 02.) Sower. 

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



3. T. cristatus Ovate, transversely striated ; longitudinal costse 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 '. coronalus. — Oblorg, transversely furrowed ; costa? numerous, sharp; 

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

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

 — London Clay. 



5. T. argutus Ovate, pointed, costated, spirally striated; costa? knotted f 



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

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

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



C. T. alveolatus Ovate acuminated ; surface divided into square cells by 



many acute sutures that decussate eight or ten prominent carina? ; whorls 

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

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



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

 many obtuse carina? ; sutures numerous, acute, linear ; aperture elongated, 

 with many lamelliform teeth within its outer lip.— Buccinum def. Pilk. Linn^ 



