S56 
MOLLUSCA. MURICID^. 
Typhis>, 
Gen. TYPHIS. — Oval, aperture suborbicular, canal short, 
covered ; whorls with numerous tubular pervious pro- 
cesses. 
1. Jistulosus. — 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. Smwr. Min. Conch, t. clxxxix. 
f. 1, 2. — London Clay. 
2. T. tuhifer. — 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. Uibifer, Park^ Org. Rem. iii. 
65. 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. ermaceus. — Whorls eight, with seven rugose, longi- 
tudinal ribs crossed by strong spiral striae. 
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. tuherosus. — Ovate, pointed, transversely striated, with many blunt 
short costae upon each whorl ; base convex — Miirex tub. Sower. Min. Conch, 
t. ccxxix. f. 1. — London Clay. 
2. T. raxnaoc 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. 62.) Sower. 
Min. Conch, t. ccxxix. f. 2. 
3. T. cristahis — 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. — Lond(m Clay. 
4. T. coronatus.—^Ohlovg., transversely furrowed ; costae 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. 
— Lon^n Clay. 
5. T. argutus — Ovate, pointed, costated, spirally striated ; costae 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. alveolatus ^Ovate acuminated ; surface divided into square cells by 
many acute sutures that decussate eight or ten prominent carinae ; whorls 
ventricose, flattened above ; aperture oval ; the outer lip toothed within.-— 
Murex alv. Sower. Min. Conch, t. ccccxL f. 2 — In Crag. 
7. T. defossus . — Ovate acuminated, smooth ; whorls ventricose, bearing 
many obtuse carinae ; sutures numerous, acute, linear ; aperture elongated, 
with many lamelliform teeth within its outer lip. — Buccinum def. Pilk. Linn- 
