CHITON. 215 



Mr. Dermis, as well as Mr. Jordan, observed that 

 specimens found between tide-marks in Herm and 

 Jersey were very much finer than those dredged 

 in deep water off the last-mentioned island. This 

 species differs from C. fascicularis in being larger, 

 and usually longer in proportion to the breadth ; the 

 central ridge is more prominent ; the granules are much 

 smaller and more numerous, and they are invariably 

 round instead of oval ; the girdle is broader, and clothed 

 with a thick pile ; the tufts are not so large or con- 

 spicuous ; and the notches are deeper. The young have 

 a remarkably elongated shape. 



The locality (Tenby) assigned by Brown to C. dis- 

 crepans belongs to C. fascicularis ; but his statement 

 that the " papillae" are round can only apply to the 

 former species. Sowerby considered it (but erroneously) 

 the C. crinitus of Pennant, which is nothing more than 

 C. fascicularis. I believe Acanthochites communis and 

 A. carinatus of Risso may be referred to C. discrepans. 



3. C. Hanle'yi*, Bean. 



C. Hanleyi (Bean), Suppl. Thorpe's Brit. Mar. Conch, p. 263 ; F. &. H. 

 ii. p. 398, pi. lxii. f. 2. 



Body oblong: girdle rather narrow, tough, covered with 

 numerous short whitish spines ; those at the posterior side of 

 each plate, issuing from the corner where it overlaps the next 

 plate, are a little longer than the rest, and assume a some- 

 what tufted form. 



Shell convex : plates shield-like, with a wide and deep 

 notch in front, moderately solid and opaque, not glossy : sculp- 

 ture, numerous but not crowded bead-like tubercles, arranged 

 in longitudinal rows, which appear in some specimens chain- 

 like ; these tubercles are smaller, finer, and closer on the crest 

 or back of each plate, and become coarser and irregular at the 



* Named in honour of Mr. Silvanus Hanley, one of the authors of 

 ' British Mollusca ' and other works on conchology. 



