SYNOPSIS. 387 



with black. — Flem. Brit. An., p. 181 ; Cuv. Beg. An. ; 

 Yarr. Brit. Fish., ii. 129 ; Jenijns'' Brit. Vert., 429. Salmo 

 eperlanus, Linn., Penn., Dan. Brit. Fish., pi. 4o. Eper- 

 lanus Rondeletii, Willuyh., p. 202. 

 Sp..l32, 0. Hehiidicus. Hebridal Smelt. Length of the 

 head in comparison with that of the body, exclusive of tlie 

 taU, as one to four ; jaws nearly equal, without teeth ; 

 eyes very large ; dorsal fin commencing half-way between 

 the point of the nose and the anterior edge of the adipose 

 fin ; the latter placed very near the tail ; tail deeply forked. 

 Fin-rays, D. 11 : P. 14 : V. 12 : A. 12 : C. 19. General 

 colour dull umber, the gill-covers silvery and iridescent, 

 two silvery white bands along the sides of the body, 

 scales large and deciduous. — Tarr. Sujpjpl. Brit. Fish. ; 

 Brit. Fish., ii. 133. 

 Gen. LXVII. Thymallus. Gape small, not extending to the 

 eyes ; opening of the mouth square ; first dorsal fin more than 

 half the height of the body and twice as long as high ; teeth 

 fine and velvet-like, the vomerian series confined to the ante- 

 rior part ; scales very large. 



Sp. 133. T. vulgaris. Grayling. General colour light yel- 

 lowish brown, with golden, copper, green, and blue reflec- 

 tions, and varied with dusky clouds ; the sides towards 

 the upper part of the body marked with longitudinal 

 dusky lines ; dorsal fin with transverse streaks formed of 

 reddish brown confluent spots. — Cuv. Reg. An. ; Willugh., 

 p. 187; Jenyns' Brit. Vert., p. 430 ; Yarr. Brit. Fish., ii. 

 ] 36. Salmo thymallus, Linn., Bloch, pt. i. pi. 214 ; Don. 

 Brit. Fish., pi. 88. Thymallus thynnus, Salvian. 

 Gen. LXVIII. Coregonus. Gape very small, not extending 

 to the eyes, the aperture oblique ; teeth still smaller than in 

 Thymallus, sometimes wanting ; front of the first dorsal higher 

 than the length of the fin ; scales very large ; appearance of the 

 body herring- like. 



Sp. 134. C.fera ? The Gwyniad. Of the size and general 

 appearance of the common herring : length of the head 

 about one-fifth of the whole length ; depth of the body 



