128 SALMONID.E. 



little more than one-half or two-thirds of the length of its base. 

 Teeth of moderate size. 



Scandiua\-ian peninsula. Scotland. ? Iceland. 



a-e. From 13 to 17 inches long. Lapland. From Mr. Wheel- 

 wright's Collection. Vert. 62. 

 f-h. From 10 to 11 inches long. Gefle. From Mr. Wheelwright's 



Collection. Vert. 60 ; Csec. pyl. 42. 

 i. Ten inches long. Gestrickland. From Mr. Wheelwright's Col- 

 lection. Vert. 62 ; Caec. pyl. 36. 

 I: Ten inches long. Sweden. Presented by Prof. Lilljeborg. 



Vert. 62. 

 l-m. Nine inches long (immature). Helier Lake, Hoy Island (Ork- 

 neys). Presented by Dr. Trail. Vert. 59 ; Caec. pyl. 36. 

 Average length of mature fish, 12 or 14 inches. 

 n-o. Eight inches long. Sutherlandshire. Presented by W. Peel, 



Esq. 

 p. Young. Loch Hoy, Invernesshire. Presented by H. C. Pennell. 



Esq. 

 q-r,s-u. From 9 to 11 inches long (mature). Scotland. Purchased 



of Mr. Stevens. 

 V, iv-z. Young. Scotland. From Mr. YarreU's Collection, 

 a, /3. Adult : stuffed. Scotland. From Mr. ParneU's Collection, 

 y. ? Adult: skin. From Mr. YarreU's Collection. 

 o-e. Fourteen inches long. Lake Myvatn, Iceland, Presented by 

 G. G. Fowler, Esq.* Vert. 61. 

 Valenciennes (Cuv. & Val. xxi. p. 249) appears to have described 

 a distinct species under the name of S. alpinus ; he attributes to it 

 sixty-seven vertebrae. 



■ In a male specimen, from Quichjoch, nearlij fourteen inches long, 

 the head and body are compressed, and but slightly elevated ; the 

 greatest depth of the body is. below the origin of the dorsal fin, 

 where it is one-fifth of the total length (to the end of the middle 

 caudal rays). The least depth of the tail is rather less than the 

 length of the base of the dorsal fin. The height of the head above 

 the mandibulary joint equals the distance between the posterior 

 margin of the orbit and the end of the operculum. The top of the 

 profile of the head is somewhat elevated above the margin of the 

 orbit, the diameter of which is nearly one-sixth of the length of the 

 head, two-thirds of the extent of the snout, and rather less than 

 one-half of the width of the interorbital space ; the latter is convex, 

 with a rather prominent ridge along the middle, and with a pair of 

 series of pores. Snout compressed, conical, with the jaws equal 

 anteriorly. The maxUlarii extends to the vertical from the hind 

 margin of the orbit; in the two largest specimens (15-17 inches 



* Unfortunately the intestines of these specimens have been removed ; er- 

 ternally they agree perfectly with our other specimens of S. alpmus. Mr. 

 Fowler informs me that the water of Lake Myvatn is in parts warm all the year 

 round, and the natives assert that the Charr are quite different from those found 

 in anv other lake in the country. 



