Revision of the Irish Char. 



231 



Three char from Lough Mask, recently )3resented to the 

 British ]y[Lisenra by Alick Duncan, Esq. (2), and Godfrey 

 Allen, Esq. (1), measure 240 to 260 mm. iu total length. 

 In tliem I count 8 or 9 branched rays iu the dorsal fin, 7 or 8 

 in the anal, and 148 to 166 scales in a longitudinal series. 

 In one of them the vertebrae number 62. Tlie gill-rakers are 

 rather shorter than in S. colii from other localities, the 

 longest measuring |- the diameter of the eye. 



In a single small specimen ( ? ) from Lough Inagh, 

 150 mm. in total length, I count 10 branched rays in the 

 dorsal tin, 7 in the anal, 160 scales in a longitudinal series, 

 and 14 gill-rakers on the lower part of the anterior arch. 

 The longest gill-rakers are nearly equal to | the diameter of 

 the eye. 



4. Salvelinus grayi. 



Salmo grat/i, Giinth. Proc. Zool. Soc. 1862, p. 51, pi. vii., 1863, p. 12, 

 and Cat. Fish. vi. p. 136 (1866) ; Day, Fish. Britain, p. 114, pi. cxix. 

 fig. 1 (1884). 



Depth of body 3^ to 4 in the length, length of head 4 to 4?. 

 Snout subconical, with upper profile decurved anteriorly, 

 longer than eye, the diameter of which is 4| to 5 in the 

 length of head. Interorbital region convex, its width 3 in 



Yi<x. 4. 



Salvelinus ijruyi (after Gliutber). 



the length of head. Dentition feeble; jaws equal anteriorly; 

 maxillary extending nearly to below the posterior margin of 

 eye or a little beyond, its length 21 to 2? in the length of 

 head; lower jaw pointed anteriorly, its length 1^ to I3 in 



