No. IV. ICHTHYOLOGY. 221 



coloured sketch of a specimen caught in North-Ravine Lake. 

 Specimens twelve inches in length are full-grown ; no larger 

 ones were found. The ovaries and testicles in specimens 

 caught in the month of August show the commencement of 

 seasonal development. 



9. SALMO ALIPES (Rich.) Of this species two examples 

 were obtained, about fifteen inches long ; it is a well-marked 

 species of charr, characterised by the deep radiating and con- 

 centric striation of the gill-covers. The typical specimens 

 were obtained in Boothia Felix ; so that this charr has an 

 unusally wide range. Colour silvery, with scarcely any 

 pinkish tinge. Caec. pyl. 41. Obtained from a lake in the 

 vicinity of Discovery Bay (lat. 81 44' N.) 



10. SALMO KARESII (n. sp.) The body much elongate, 

 its greatest depth being one-fifth, or even one-sixth, of the 

 total length, without caudal. The length of the head is 

 one-fourth or two-ninths of the same length, and nearly 

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

 from the origin of the dorsal fin. The snout is obtuse, the 

 forehead flat ; and the maxillary extends in the male to the 

 vertical from the hind margin of the orbit, but in the female 

 it is somewhat shorter. Teeth very small, those of the vomer 

 limited to the anterior extremity of the bone, a band of villi- 

 form teeth along the middle of the hyoid. Praeoperculuin 

 with the angle much rounded, and without a distinct lower 

 limb ; suboperculum more than twice as long as deep. The 

 gill-cover shows scarcely a trace of the radiating and concen- 

 tric striae by which Salmo nitidus is characterised. Pectoral 

 shorter than, or equal in length to, the head without snout ; 

 and at least one-half, or more than one-half, of the distance 

 of its root from the ventral. Ventral fins terminating at a 

 considerable distance from the vent. D. 13 ; the largest ray 

 scarcely longer than the distance of the eye from the end of 

 the operculum. A. 11. Caudal deeply excised, its middle 

 rays not quite half as long as the outer ones. Scales minute. 

 Branchiostegals 11. 



Pyloric appendages 42. Vertebrae 65. 



