214 chitonid,e. 



2. C. dis'crepans *, Brown. 



C. discrepans, Brown, 111. Conch, p. 65, pi. xxi. f. 20 ; F. & H. ii. p. 396, 

 pi. lviii. f. 4. 



Body oblong : girdle broad, covered with a thick pile, like 

 velvet, which is usually of a greyish tint ; tufts similar in 

 number and arrangement to those of Q. fasciculaHs, but not 

 so large ; they are whitish or tawny, with sometimes a 

 greenish hue ; spines of marginal fringe not longer than those 

 which form the pile. 



Shell more convex in the middle than the last species, 

 occupying only one-half of the entire breadth : plates similar 

 in shape : sculpture, very fine and numerous round granules, 

 arranged in rows which converge in a curved direction towards 

 the beak in each plate ; their tips are flattened in adult speci- 

 mens, but seldom concave ; ridge prominent and rather sharp, 

 separated from the granulated portion on each side of it y 

 closely striated or lineated lengthwise, and having a rubbed 

 or polished appearance : colour greyish, mottled with dull 

 reddish-brown ; the ridge is generally darker and sometimes 

 marked by a black cuneiform streak : beaks sharp and pro- 

 jecting : inside smooth and polished, of a greenish cast : 

 notches as in C. fascieularis, but sharper. L. 1-25. B. 0*6. 



Habitat : Not uncommon on rocks and stones in the 

 Channel Isles, from low-water mark to 25 f.; sometimes 

 associated with C. fascieularis, which is much less fre- 

 quently met with in this outlying part of Great Britain. 

 The only other British locality that I am aware of is 

 Coomb, in Lantivet Bay, Cornwall, as C. crinitus 

 (Couch) : I have not seen the specimens. It occurs on 

 the coast of France from the Boulonnais to Nice; 

 Corsica (Payraudeau) ; Sicily, as C. fascieularis, var. 

 major (Philippi) ; Balearic Isles and Mogador (M' An- 

 drew) ; and Loven has enumerated it among the Scan- 

 dinavian mollusca as C. crinitus (" Boh-Norv. v ) ; but 

 I fear he mistook a variety of C. fascieularis for the 

 present species. 



* Different, i.e., from C. fascieularis. 



