114 Mr. C. T. Regan on the 



3. Salvelinus toillughhii. 



Salmo williif/hbii, Giinth. Proc. Zool. Soc. 1862, p. 46, pi. v., and Cat. 

 Fish. vi. p. 131 (1806); Day, Fish. Britain, ii. p. 113, pi. cxvii. 

 fig. 2 (1884). 



Depth of body 3| to 5 in the length, length of head 4 to 

 ^4 (c?) or 4^ to -if ( ? ). Snout conical {^) or somewhat 

 obtuse ( ? ), as long as or longer than eye, the diameter of 

 which is 4^ to 6 in the length of head. Interorbital region 

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

 moderate ; jaws equal anteriorly or the lower jaw a little 

 shorter than the upper ( ? ) ; maxillary extending to below 

 the posterior margin of pupil (young) or beyond the eye 

 (adult ^ ), its length 2^ to 2| in the length of head; lower 

 jaw pointed anteriorly, its lengtli | "(adult J) or less than 5 

 of tiie length of head. 9 to 12 branchiostegals. 11 to 16 

 moderately long gill-rakers on the lower part of anterior 

 arch. 160 to 194 scales in a longitudinal series. Dorsal 

 with 8 or 9 branched rays, its origin nearer to the tip of 

 snout than the base of caudal, the longest ray ^ to | the 

 length of head. Anal with 7 to 9 branched rays. Pectoral 

 I to I the length of head, extending 3 to | ( (^ ) or i to § ( ? ) 

 of the distance from its base to the base of pel vies. Least 

 depth of caudal peduncle li to 2 in its length and from I to 

 more than | of the lengih of head. Greenish or bluish 

 above, silvery or orange below ; back and sides with orange 

 spots ; dorsal and caudal dusky ; lower fins more or less red, 

 the pelvics and anal with pale anterior edges. 



Windermere. 



Sixteen specimens, 160 to 290 mm. in total length, in- 

 cluding the types of the species. 



4. Salvelinus perisii. 



Salmo cambrictis (non Donov.), Giinth. Proc. Zool. Soc. 1862, p. 49, 



pi. vi. 

 Salmo lierisii, Giinth. Ann. & Mag. Nat. Hist. xt. 1865, p. 75, and Cat. 



Fish. vi. p. 133 (1866); Day, Fish. Britain, p. 112, pi. cxix. fig. 2 



(1884). 



Depth of body 4-5 in the length, length of head 3|-4 {S) 

 or 45—4^ ( ? )• Snout conical, pointed, as long as or longer 

 than eye, the diameter of which is 4^-5 in the length of 

 head Interorbital region flat, its width 3|-3f in length of 

 head. Dentition rather strong; jaws equal anteriorly ( (J ?) 

 or the lower projecting ( J ) ; maxillary extending nearly to 

 below the posterior margin of eye or a little beyond, its 

 length 2i-2.2 [S) or 25'-2f (?) in the length of head; 



