198 SUPPLEMENT. 



Dalmatia (Brasilia) ! In Philippi's collection this species was 

 mixed with 0. discrepans. 

 P. 214. — C. DISCREPANS. 



Body lemoncolour : mantle faintly tinged with pink, lami- 

 nar : head semicircular : mouth star-like or puckered when 

 not engaged in feeding : foot elongated, rounded at each end : 

 gills yellowish-brown, about 20 on each side, becoming larger 

 towards the posterior extremity ; they commence at the middle 

 of the body and extend about halfway down : duct large, 

 tubular : girdle extremely broad and fleshy, thickly covered 

 with short hairs. 



E. Atl. and Med. coasts of Spain (Hidalgo) ; Zara (J. G. J.). 

 P. 215.— C. Hanleyi. 



Body pale yellowish-white, tinged with pink : mantle thick : 

 head-lobe horseshoe-shaped, and narrowly edged with pink : 

 mouth large, and puckered : foot whitish, microscopically dotted 

 with flake-white ; it is truncated or bluntly rounded in front : 

 gills extending on each side of the vent or excretal tube, which 

 is conical and prominent : girdle underneath thick, greyish, 

 with black specks. The inside of each plate in the middle is 

 strengthened by a thick bow-shaped rib. 



F. Norway (Crosskey and Robertson) ! E. Loffoden I., 

 300 f. (Sars) ; Faroe I. (Morch) ; G. Naples, 60 f. (Acton and . 

 Stefanis) ! ; Manan I., Maine (Mighels, as G. mendicarius). 



P. 217. — C. CANCELLATUS. 



Body yellowish- white : mantle rather thin, edged with 

 fleshcolour : mouth round and somewhat prominent : foot lan- 

 ceolate, squarish in front, bluntly pointed behind ; sole marked 

 lengthwise with 4 fleshcolour lines, the outer broader than the 

 inner ones : gills plume-like, short but conspicuous, placed 

 near the tail, 5 on each side. 



E. Loffoden I., 300 f. (Sars); Yigo (M'Andrew)!; Dal- 

 matia (Brusina) ! Specimens from low-water at Herm are 

 larger than those dredged in the coralline zone. 



P. 218, 1. 4 from bottom, C. Rissoi is a different species. 



P. 518.— C. cinereus. N. of Hebr., 189 and 530 f. (C. 

 and T.). F. Caithness (Peach) !; Norway (Sars and others) ! 

 E. Heligoland (Hoffmann) ; G. Gascony (Fischer) ; not Medi- 

 terranean. The description given by Fabricius confirms that of 

 Linne in the determination of this species as C. cinereus. 



