MUREX. 691 



Inhabits the Mediterranean. Linnceiis. Coasts of Great Bri- 

 tain. Pennant, &)'c. 



Shell an inch and a quarter or an inch and a half long, and 

 about half as broad, thick, and of a brownish white or pale 

 yellowish brown colour ; it has six or seven slightly foliated 

 varices, which are alternately stronger, and crossed by alter- 

 nately large and small transverse ribs ; these ribs, on close 

 examination, appear to be formed of small imbricated scales, 

 which make the whole surface very rough. 



SACELLUM. 20. Shell with the upper part of the 

 whirls flattish, and muricated transverse ribs 

 below; outer lip crenated. 



Murex Sacellum. Chemnitz, x. p. 267. t. l63. f. 1561 and 

 1362. Gmelin, p. 3530. 



Inhabits the coasts of the Nicobar Islands. Chemnitz. 



Chemnitz has described this shell to be twenty-one lines long, 

 and sixteen broad, of a yellowish colour, spotted with brown on 

 the spines of the ribs ; the upper part of the whirls is flattish, 

 and bordered by an imbricated margin, below which they are 

 armed with transverse muricated ribs; these ribs may proba- 

 bly be formed of scales, somewhat in the same manner as 

 those of M. ErinaceuSy but it can hardly be said that the 

 shell is foliated, nor has it any varices, and its claim to be 

 placed in this division appears to be very doubtful. 



*** With thick 'protuberant rounded Varices. 



RANA. 21. Shell with two opposite varices, and 

 remote transverse spinous belts, and granu- 

 lated striae ; whirls rounded, and the spines 

 short ; aperture ovate. 



Murex Rana. LinncEus Syst. Nat. p. 1216. Born Mus. 



p. 295. Martini, iv. p. 106. t. 133. f. 1268 and to 1271. 



Schroeter Einl. i. p. 486, and Inn. Bau Conch, p. 42. t. 



4. f. 9- Gmelin, p. 3531. Schreibers Conch, i. p. IQS. 



Burrows's Elements, p. l64. t. 18. f. 3. 

 Rana aspera. Humphrei/s, Callones Cat. p. 33. No. 6 13. 

 Bonanni Rec. 3. f. 182, and Kirch, f. 183. Lister Conch. 



t. 995. f. 58. Rumphius, t. 24. f. G. Petiver Gaz. t. 



100. f. 12. Gualter, t. 49- f. L. Seba, iii. t. 60. f. 13, 



and 15 to 18. Knorr, ii. t. 13. f. 6 and 7. Regenfuss, 



i. t. 6. f. 64. Favanne, t. 32. f. B 3. 



