784 TROCHUS. 



Trochus infundibuliformis. Gmelin, p. 3575. Schreibers 



Conch, i, p. 247. 

 Trochus planior infundibuliformis. Chemnitz, v. p. 133. 



t. 173. f. 1706 and 1707. 

 Trochus, No. 97. Schroeter Eml. i. p. 718. 



Inhabits 



Shell about seven lines broad, and appears by the figure to be 

 almost as flat as some of the depressed Helices ; the colour 

 is pale chestnut, without any variegations, and the aperture 

 is round. Chemnitz says it is a very scarce species. 



HYBRiDUs. 61. Shell convex, with the pillar two- 

 toothed, and the umbilicus crenulated. 



Trochus hybridus. Linnaus S^/st. Nat. p. 1228. Chem- 

 nitz, v. p. 132. 1. 173. f. 1702 to 1705. Schroeter Einl. 

 i. p. 652. Gmelin, p. 3567. Schreibers Conch, i. p. 241. 

 Le Cadran flambe. Favanne, ii. p. 428. 

 Inhabits the Mediterranean. Linnczus. 

 Linnceus says that this shell resembles T. perspectivus, but is 

 only one fourth as large, and has the superficies smooth but 

 not shining, and is not marginated at the base. 



PERSPECTIVUS. 62. iShell convex, and obtusely 

 marginated at the base ; umbilicus large, 

 pervious, and crenulated. 



Trochus perspectivus. Linnccus Si/st. Nat. p. 1227. Borri 

 Mus. p. 329, and Vign. at p. 326. f. b. Chemnitz, v. 

 p. 121. 1. 172. f. 1691 to ]696, and xi. p. l62. t. 196. 

 f. 1884 and 1885. Schroeter Einl. i. p. 650. Gmelin, 

 p. 3566. Schreibers Conch, i. p. 241. Brookes s Int. 

 p. 123. t. 7. f. 94. 

 Solarium perspectivus. Lamarck Syst. des Anim. p. 86. 

 Le Cadran. Favanne, ii. p. 422. 1. 12. f. K. 

 Bonanni Rec. 3. f. 27 and 28, and Kirch, f. 26 and 27. 

 Lister Conch, t. 636. f. 24. Rumphius, t. 27. f. L. Peti- 

 ver Amb. t. 2. f. 14. Gualter, t. (j5. f. O. Argenville, 

 t. 8. f.M. Seba, iii. t. 40. f. 1, 2, 13, 14, 41, and 42. 

 Knorr, i. 1. 11. f. 1 and 2. Geve. t. 25. f. 266 and 267. 

 Regenfuss, i. t. 6. f.6l. 

 Inhabits the shores of Asia, and is frequent about Alexandria. 

 LinncEus. Amboyna. Rumphius. Tranquebar. Regen- 

 fuss. Bantam, the Moluccas, Borneo, and other islands 

 in the Indian Ocean. Favanne. China. Humphreys. 

 Shell one, or sometimes near three inches broad, and less than 



