326 THE FRESH-WATER FISHES OF EUROPE. 



The maxillary bone has the same posterior extension, with nineteen to 

 twenty-one medium-sized teeth. There are six or seven teeth in each pre- 

 maxillary, seventeen in each mandible, seven on the vomer, in a V-shape, 

 fifteen on each palatine bone, and five pairs on the tongue. Only three 

 branchiostegal rays are exposed in a side view. The lower branch of the 

 outer branchial arch has thirteen straight lanceolate gill-rakers. 



The fins present but little variation from the other types, though the base 

 of the pectoral is overlapped by the opercular apparatus. 



The scales are similar to those of S. vvillugkljii, and the perforated series of 

 the lateral line similarly does not correspond to the transverse series. The 

 colour is essentially the same ; but the sides show numerous orange-red spots. 

 The fins have the same white anterior margin, red colour on the abdomen, 

 and black on the back and tail, though both dorsal and caudal fins have lighter 

 margins. 



Salmo colii (GUNTHER). 



D. 14, A. 12, P. 13, V. 9. Scales : lat. line 160. 



This is a small fish, seven to eight inches long, described by Dr. Giinther, 

 from the Irish loughs, Dan and Esk. It has the same form as other Charr, 

 in which the depth of the body is one-fifth of the total length of the fish. The 

 eye is similarly one-fifth of the length of the head. The frontal interspace is 

 half as wide again as the eye, very slightly convex, with a faint median ridge. 

 The maxillary bone has thirteen to seventeen small teeth, and all the other 

 teeth are small. There are four to six in the pre-maxillary, fifteen each in the 

 mandible and palatine bones, three on the vomer, and four pairs on the tongue. 



The base of the dorsal fin is longer than its last ray. The base of the pec- 

 toral fin is not overlapped by the operculum ; the fin is shorter than the head. 

 The back is bluish-black, with silvery sides, dotted over with light salmon- 

 coloured markings ; the belly is reddish. The fins are black, though there is a 

 reddish tinge in the pectoral and ventral, and the ventral and anal have a 

 white margin. The number of vertebra? is sixty-three ; and the forty -two 

 pyloric appendages are extremely short. It is perhaps most nearly related 

 to the Windermere Charr. 



Salmo willughbii (GUNTHER). 

 D. 1213, A. 12, P. 1314, V. 11). Scales : lat. line 165. 



The Charr of Windermere also occurs in Cumberland and in Loch Bruiach, 

 in Scotland. The Lancashire fishes are eleven inches long, with fifty-nine 



