Revision of the Irish Char. 



229 



length of head. Silvery; back bluish grey; dorsal, caudal, 

 and pectoral fins dusky; pelvics and anal pale. 



Bab. Lough Owel in Westmeath. 



A single specimen, 280 mm. in total length. 



This species differs from S. colii in having the scales 

 smaller, the snout more pointed, and the mouth more oblique 

 and smaller, the maxillary having the same relative length as 

 in specimens of S. colii of 200 mm. 



I have named it after Dr. R. Scharff, to whom I am 

 indebted for the opportunity of describing it, in recognition 

 of the favours I have received from him during my work 

 on Irish fishes. 



2. Salvelinus trevehjani, sp. n. 



Depth of body 5 in the length, length of head 4. Snout 

 conical, pointed, considerably longer than eye, the diameter 

 of which is 5 in the length of head. Interorbital region 

 convex, its width 3| in the length of head. Dentition strong ; 

 cleft of mouth oblique; jaws equal anteriorly; maxillary 

 extending nearly to below the posterior margin of eye, its 

 length 2^ in the length of head ; lower jaw pointed anteriorly, 



Fie:. 3. 



Saloelinus trevelyani. 



its length 1* in the length of head. 9 or 10 branchiostegals. 

 11 gil!-rakers on the lower part of anterior arch, the longest 

 ^ the diameter of eye. 165 scales in a longitudinal series. 

 Dorsal 13, with 9 branched rays, its origin a little nearer to 

 the tip of snout than the base of caudal, the longest ray a 

 little more than ? the length of head. Anal 11, with 7 

 branched rays. Pectoral 4 the length of head, extending 3 

 of the distance from its base to the base of pelvics. Lease 

 depth of caudal peduncle 2 in its length and 1 the length of 

 head. Scattered rounded spots on the sides ; fins dusky. 



