24 



SALMONID."E. 



p. 250 (descr. part) ; Pdi-mU, Fish. Firth of Forth, p. 133, pi. 84. 



t. 1 1 ; Jardlrii; in Edinb. Nviv Phil. Joiirn. xviii. p. 4'J. 

 Saliiio huclu) (!), Firm. Brit. An. p. 179. 

 Salmo eriox, Parncll, Fish. JlV</i o/i^wi!7t,p.l28,pls.32-34; Fleming, 



Brit. Aitim. p. 180. 

 [Couch's Sea-trout, at least the figure (pi. 214), appears to have been 



a variety of the common Trout, or a hybrid between Trout and 



Sewin.] 



Osteologt/. 



Salmo eriox, Otcen, Catal. Osteal. Ser. Coll. Surg. i. 185.3, p. 16 (de- 

 tailed description of skeleton). 



B. 11. D. 13. A. 11. P. 15. V. 9. L.lat. 120. L. traiisv. 2g. 

 Vert. 59-60. Caec. pyl. 49-61, rarely less. 

 Attaining to a length of about 3 feet ; female mature at a length 

 of from 10 to 12 inches. 



Head rather short, compared "with its depth; operculum short, its 

 length being contained in its depth from once and three-fifths to 

 twice ; like the other bones of the skuU, it is thin, and in dried speci- 

 mens there are several concentric striae near to and parallel with its 

 hinder margin. The hind margin of the gill-cover is obtusely rounded, 

 with the suboperculum scarcely pro- 

 jecting beyond the end of the opercle. 

 The posterior point of junction of oper- 

 culum and suboperculum is generally- 

 nearer to the lower anterior angle of the 

 suboperculum, than to the upper end of 

 the gill-opening. Praeoperculum with 

 a distinct lower limb, with the angle 

 rounded, and with the hind margin 

 convex. Snout rather short, mode- 

 rately produced in full-grown males 

 [lower jaw hooked during the spawning- 

 season] ; maxillary longer than the 

 snout, extending to below the posterior 

 margin of the orbit in adult examples, and to behind the middle of 

 the eye in specimens 6 inches long (Parr-state); it is always rather 

 slender and feeble, and ■with longitudinal ridges in dried examples. 

 Head of the vomer triangular, as broad as long, toothless ; body of 

 this bone with a longitudinal ridge, armed with a single series of 

 teeth, some of which are bent outwards ; the greater part of these 

 teeth are lost at various ages, so that sometimes only three or four are 

 left in specimens 12 inches long, whilst other much older examples 

 of 20 inches sometimes show six or eight ; generally only the two or 

 three anterior ones are found in examples of more than 20 inches in 

 length. 



Fins «hort, especially pectoral and caudal. 



The caudal fin is cleft in young examples, in which the longest 

 rays are not quite twice as long as the middle ones ; it is generally 



