4 TESTACEOUS MOL.LUSCA. 



T. Palmulatus. Lam. 2. — Gray in Phil. 3Iag. 1827, — Adan- 

 son. Act. de V Acad, des Sc. 1/59.^. 9./. 12.— Bl. t. 80. bis. 

 _/'. 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. — Sumatra. 



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. BiPENNATUs* 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. CoRNiFORMis. Desh. in Lam. 6. f. 29.— Fistulana C. 

 Lam. 2. — Fav. t. 5. N.—Bl. t. 81./. 4.?— T. Utriculus? 

 Gmel.374b. — Kcem. Cab. Rud. p. 7. t. 1.1 Slender club-shaped, 

 undulatingly twisted ; mouth divided by two enclosed tubes — 

 variety, more twisted, the posterior end with some arched chambers. 

 — Indian Ocean . i 



T. Nana.* Turton Biv. p. 16. t. 2. /. G, 7. The valves 

 rounded and without auricles behind ; a strong conic tooth on the 

 margin above the teeth. 



T. Malleolus.* Turton Biv. p. 255. t. 2./. 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 I have a shell which agrees tolerably well with Lamarck's de- 

 scription. The tube possesses a kind of double wall, between which 

 are winding septse. — Blainville's figure is that of the T. Utriculus of 

 Gmelin. — { TF. ^ 38./. 3.) Our figures are copied from Favanne 

 and Kaammerer. 



