C011EGONUS MEGALOPS. 347 



Coregoims maxillaris (G-UNTHER). 



D. 13, A. (14) 16. Scales : lat. line 87 (96), transverse - 



Species which resemble each other in the vertically truncate form of snout 

 do not present very striking differences in other parts of the body. Dr. 

 Giinther admits the close correspondence of this form with C. wartmanni, but 

 distinguishes it as having the body much more elevated. But as it is found only 

 in Lake Wener, it is quite possible that this may be a representative variety 

 rather than a distinct species. Excluding the caudal fin, the height of the 

 body, as measured by Giinther, is two-sevenths, and the length of the head 

 two-ninths of the total length. The eye is one-fifth of the length of the head, 

 and shorter than the snout. The lower jaw is a little shorter than the upper. 

 The space between the eyes is fiat. The maxillary bone of the upper jaw is 

 strong, and the supplementary bone upon it is semicircular. It is known in 

 Scandinavia, according to Mr. Lloyd, as the Lof-sik. It is eighteen inches long-. 



We are inclined to regard some other of Dr. Gun ther's species also in the 

 light of northern representatives of C. warlmanni, just as the C. clupeoides is 

 a British representative of the same species. And though we give short notes 

 on the following types, it is with a view of showing the nature of the diversity 

 which a species may assume in Lake Wener in which they occur. 



Coregonus humilis (GTUNTHER). 

 D. 13, A. 15. Scales : lat. line 90 96, transverse 



This variety grows to the same size as C. maxillaris, and is similarly found 

 in Lake Wener. It is referred to by Mr. Lloyd as Martin smess-sik. Ex- 

 cluding the caudal fin, the fish is four times as long as high, and the head is 

 two-ninths of the length. The eye is one-fifth of the length of the head, and 

 two-thirds of the length of the snout. The head is flattened, and in the male 

 there are numerous small black dots on the head and dorsal fin. 



There are sixty vertebrae. 



Coregonus megalops (WIDEGREN). 



D. 14, A. 16, V. 11. Scales : lat. line 92. 



A Coregonus is found in the lakes of Northern Sweden which may be dis- 

 tinguished from those of Lake Wener. The height of the body is nearly 



