152 SALMONID.E. 



the characters of the Coregoni, it is difficult to refer our species 

 with certainty in the absence of foreign specimens with which 

 to make actual comparison. 



It appears, on reference to his Natural History of Fishes, 

 that Lacepede became aware of the existence of this Coregonus 

 in Loch Lomond by the communication of M. Noel, who 

 visited Scotland in August 1802. Although some little 

 differences appear in the descriptions of this fish, as given by 

 Lacepede and Dr. Parnell, there is little doubt that both 

 authors had the same species under consideration. This fish 

 bears, as observed by Dr. Parnell, considerable resemblance 

 in appearance, and also in the number of its fin-rays, to the 

 Salmo Wartmanni of Bloch, part 3, tab. 105, a species of 

 Coregonus, named after a learned physician, who first de- 

 scribed it. It is found in some of the lakes of Switzerland, 

 and also in lake Constance; but Lacepede, to whom the 

 Wartmanni was known, considered the Loch Lomond Core- 

 gonus distinct. It is thus described by Dr. Parnell, from a 

 specimen fourteen inches in length. 



" Head long and narrow, of an oval form, about one-fifth 

 the length of the whole fish, caudal fin included ; depth of 

 the body between the dorsal and ventral fins less than the 

 length of the head. Colour of the back and sides dusky 

 blue, with the margin of each scale well defined by a number 

 of minute dark specks ; belly dirty white ; the lower portion 

 of the dorsal, pectoral, ventral, and anal fins dark bluish grey; 

 iricles silvery, pupils blue. First ray of the dorsal fin com- 

 mencing half-way between the point of the snout and the 

 base of the short lateral caudal rays ; the first ray simple, the 

 rest branched; the second and third the longest, equalling 

 the length of the pectorals ; the seventh ray as long as the 

 base of the fin ; the last ray one-third the length of the 

 fourth ; adipose fin large and thin, situate midway between 

 the base of the fourth dorsal fin-ray and the tip of the long 



