396 CHITONID^. 



generally distributed all around our shores, that to enu- 

 merate localities would be superfluous. It ranges north- 

 wards to the shores of Norway, and southwards to the 

 Mediterranean. Some remains of Chitons in the coralline 

 crag are doubtfully referred to fascicularis by Mr. Searles 

 Wood. 



0. DiscREPANs, Brown. 



Valves with numerous fine, irregularly disposed, granules ; 

 ligamental border with tufts of bristles. 



Plate LVIII. fig. 4. 



Chiton fascicularis. Wood, General Conch, pi. 2, f. 6 (probably). — Philippi, 

 Moll. Sicil. vol. i. p. 108, pi. 7, f. 2 (var. major).— 

 Reeve, Conch. Icon. vol. iv. Chiton, pi. 10, f. 53. 

 „ criniius, Sowerby (not Pennant), Conch. 111. Chiton, spec. 2, f. 88 to 



91.— Brit. Marine Conch, p. 251. 

 „ discrepafis, Brown, Illust. Conch. G. B. p. 65, pi. 21, f. 20. 



We have preferred the name given to this species by 

 Brown, to the generally accepted one of crinitus, an epithet 

 revived by Mr. Sowerby in his excellent iconographic 

 monograph of the British Chitons. For, independently of 

 the disqualifying obscurity of the definition, the northern 

 locality, and the small dimensions attributed to his species 

 bv Pennant — who naturally would be better acquainted 

 with the more ahmidant fascicularis, with which we regard 

 his seven-valved critiitus as identical — forbid our attaching 

 the name of that author to the shell we are about to 

 describe. 



This Chiton bears so close a resemblance to the preceding 

 species as to render its discrimination a little difficult ; the 

 smaller size and rather different shape of the granules, the 

 elevation and comparative smoothness of the dorsal ridges, 

 and the greater proportionate breadth of the margin are the 



