826 TURBO. 



three quarters broad, of a yellowish white colour, sometimes 

 tinged with green, and marbled in irregular longitudinal 

 streaks with chestnut-brown ; it has five or six produced 

 transversely angulated whirls, which are ribbed transversely 

 and longitudinally wrinkled ; on the angulated keel of each 

 whirl there is a row of vaulted spines, and also another row 

 towards the base of the body-whirl ; the inside in full-grown 

 shells is of a rich glittering gold colour. 



TECTUM-PERSicuM. 25. Shell conical-ovate, with 

 two rows of obtuse depressed spines, and the 

 base granalated. 



Turbo Tectum-Persicum. Linnaus Sysl. l^at. p. 1234. 



Chemnitz, v. p. 41. t. 163, f. 1543 and 1544. Schroeter 



Eiid. ii. p. 15. Gmelin, p. 3591. Schreibers Conch, i, 



p. 271. 

 La petite Pagode. Favanne, ii. p. 341. t. 13. f. F. 

 Giialter, t. 60. f. M. Jrgenville, t. 8. f. P. Geve, t. 9, 



f. 66. 

 Inhabits the Asiatic Ocean. Linnaus. 



Shell about an inch long, and nearly equally broad, of a some- 

 what pyramidal form, with transverse wrinkles and two 

 rows of spines on each whirl ; the colour is white, prettily 

 mottled and somewhat fasciated with brown ; the throat is 

 white, somewhat silvery, and grooved. Chemnitz, al- 

 though he has described this shell for the Linnaean Turbo 

 Tectum-Persicum, has followed Favanne and Geve in 

 placing it among the Trochi ; and the shell, which Born 

 has figured for this species, is Truchus imbricatus. Mr. 

 Burrows has justly observed, that ' it is scarcely possible 

 to define the boundary at which the Trochi with rounded 

 apertures are supposed to end, and the Turbines with im- 

 perfectly circular mouths to begin their jurisdiction.' 



TROCHiFORMis. 26. Shell conical-ovatCj with two 

 rows of white granules on the body-whirl, 

 and one on each whirl of the spire. 



Trochus nodulosus. Gmelin, p. 3582. 

 Trochus, No. 21. Schroeter Einl. i. p. 687. 

 Trochus duplici serie granulorum, Sic. Chemnitz, v. p. 42. 

 t. 163. f. 1545 and 1546. 



Inhabits the Southern Ocean. Chemnitz. 



This shell appears by Chemnitz's figures to be nearly of the 

 same size and shape as T*. Tectum-Persicum, and is distin- 

 guished by its transverse rows of white granules. 



