\'A0 salmonid.t:. 



Tho operculum is as high as long ; the pectoral fin terminates at a 

 cousidorahle distance from the vertical from the oiigin of tlie dorsal, 

 e(|uals the length of the head without snout, and is contained once 

 and a ijuarter in the distance between its root and that of the ventral. 

 The females do not differ from the males. The immature specimens 

 have the same short pectorals which we have found in tho young 

 Lap Charr ; but the operculum is much less elongate. 



4. Salmo nivalis. 



Salmo alpinus (nivalis), Faher, Fische Islamh, p. 1G9. 



rivalis, Gaimnnl, Vmj. Isl. et Groenl. pi. 15 (not good). 



nivalis, Giinth. Proc. Zool. Soc. 1863, p. 12, pi. 1 (yoimg). 



D. 14, A. 13. L. lat. 190. Yert. 62. Csec. pyl. 41. 



Body slightly compressed and elongate ; its greatest depth equals 

 the length of the head, and is one-fifth, or somewhat less than one- 

 fifth, of the total length ; the length of the head is rather more thau 

 one-half of the distance between the snout and the vertical from the 

 origin of the dorsal fin. The maxillary extends beyond the orbit in 

 the adult fish (15-20 inches long) ; the eye is less than one-half of 

 the interorbital space in the adult fish. The length of the pectoral 

 fin is, in mature and immature specimens, more or much more than 

 one-half of the distance of its base fi'om the root of the ventral. The 

 length of the longest dorsal ray equals that of the pectoral, or that 

 of the head without snout ; the length of the last ray is two-thirds 

 of the length of the base. Teeth rather small. Lower parts of a 

 deep orange -colour ; lower fins with the anterior margin white or 

 light orange-coloured. 



Iceland, inhabiting rivers as well as lakes. 



a~d. From 10 to 21 inches long ; had been smoked. Iceland. Pre- 

 sented by Mr. Bartlett. 

 e-f. Eleven inches long. Iceland. Presented by G. G. Fowler, Esq. 



5. Salmo killinensis. 



Gunth. Proc. Zool. Soc. 1865, p. 699, pi. 40. 



D. 14-15. A. 13. P. 13. V. 9. L. lat. 180. Vert. 62. 

 Cffic. pyl. 44-52. 

 Head and body thick, but slightly compressed ; the greatest depth 

 of the body equals the length of the head, and is two-ninths of the 

 total length (to the extremity of the central caudal ray) ; the length 

 of the head is a little more than one-half of the distance between the 

 snout and the vertical from the origin of the dorsal fin. The lower jaw 

 is rather shorter than the upper, and the maxillary extends scarcely 

 beyond the hind margin of the orbit in adult males. Teeth very 

 small. Snout obtuse ; eye of moderate size, much shorter thau the 

 snout, and about half the width of the interorbital space. Suboper- 

 culum very short and liigh. Fins excessively developed ; pectoral 

 not much shorter than the head. Dorsal long and high, the longest 

 ray being nearly as long as the head (without snout), or shorter than 



