4 TESTACEOUS MOLLUSCA. 
T. Patmuxatus. Lam. 2.—Gray in Phil. Mag. 1827.—Adan- 
son. Act. de [ Acad. des Sc. 1759. t. 9. f. 12.—Bl. t. 80. bis. 
jf. 8. Tube cylindrical, thin; shell ovate, globular, the front lobe 
narrow triangular, lower edge rounded, very finely concentrically 
striated, central band thin, hinder portion smooth, hinder dorsal 
edge ovate expanded (not recurved) ; internal tooth broad, com- 
pressed, sickle-shaped, at right angles with the inner side of the 
shell: pallet short at the base, its setaceous end compressed, end 
broad pinnated and articulated.—Suwmatra. 
T.Carinata. Gray in Mag. Phil. 1827... Tube long, 
cylindrical : shell subglobular, the front lobe triangular, lower edge 
straight, rather oblique, concentrically grooved: medial band thin, 
hinder portion with concentric wrinkles, posterior dorsal area ex- 
panded, recurved, parallel to the hinge: edge deeply keeled inter- 
nally : internal tooth compressed, curved, placed obliquely with 
respect to the inner surface of the valve : pallet, with its base short 
setaceous end compressed, end broad, linear-lanceolate, pinnately 
articulated.— Sumatra. 
T. Birpennatus.* Turton Dic. f. 28 § 40.—Turt. Biv. p. 
15.—Gray in Phil. Mag. 1827. Valves exactly like the last in 
shape but twice its size, and the front lobe rather larger, the hinder 
portion nearly smooth, and the inner edge not so much keeled : 
pallet with a very long setaceous stern (6 inches), the end short 
and pinnately articulated, ends of the joints long and filiform : 
tube thick, not concamerated. 
T. Cornirormis. Desh. in Lam. 6. p. 29.—Fisrunana C. 
Lam. 2.— Fav. t. 5. N.—Bl. t. 81. f. 4.?—T. Urricurivus? 
Gmel. 3748.— Kem. Cab. Rud. p. 7. t. 1.2 Slender club-shaped, 
undulatingly twisted ; mouth divided by two enclosed tubes— 
variety, more twisted, the posterior end with some arched chambers. 
—Indian Ocean.} 
T. Nana.* Turton Biv. p. 16.t. 2. f. 6, 7. The valves 
rounded and without auricles behind ; a strong conic tooth on the 
margin above the teeth. 
T. Mauiteouus.* Turton Biv. p. 255.t.2.f. 19. Tube very 
thin and slightly semiconcamerated at the termination ; valves ear- 
shaped behind, and the auricles reflected : the accessorial valves 
transverse and mallet-shaped. 

1] have a shell which agrees tolerably well with Lamarck’s de- 
seription. The tube possesses a kind of double wall, between which 
are winding septee.—Blainville’s figure is that of the T. Utriculus of 
Gmelin.—(W. t. 38. 7.3.) Our figures are copied from Favanne 
and Kaammerer. 
