FISHES. 515 



C. albula. In the dimensions it comes nearest to the fol- 

 lowing species, from which, however, it can easily be dis- 

 tinguished by the eyes, which in C. Nilsonii are considerably 

 smaller than in C. megalops. 



C. megalops, N. Sp. Both jaws alike ; the breadth of 

 the upper maxillary more than its height. Nose and fore- 

 head broad, but the nose in front of the eyes is curved down. 

 Eyes large, equal to about one-third of the length of the 

 head ; body form more round and even than in any other of 

 our gwynniads. The upper maxillary extends to the front 

 edge of the eye, which lies more than one eye diameter from 

 the point of the nose. The dorsal is higher in proportion 

 than in any other Scandinavian species. D. 14; P. 15; 

 V. 11; A. 16; C. 19; scales on lateral line 92. Colour 

 above dark soot brown, with a very slight silvery tinge; 

 belly and sides reddish, silvery. 



Is the rarest, as well as the least of all the species. 

 The largest I have seen have not exceeded 200 mm. in 

 length. 



He gives very fair reasons why this fish differs from the 

 young of any other Scandinavian sik, and says that from the 

 form of the upper maxillary it appears to come nearest to 

 C. Pollan, Thompson, but in this latter the eye is much 

 smaller than in the C. megalops. 



I shall now quote a few extracts from Malmgren's " Fish 

 of Finland" (1863), in which he remarks 



"Till now the coregoni have been but little known. 

 Professor Nilsson has to one species joined at least three 

 good species : C. oxyrhynchus, L. ; C. lavaretusj L. ; and 

 C. fera, Widigren (not Jurine) ; and has taken as a distinct 

 species the young of the true G. lavaretus, L." 



As Finnish species he gives us 



1. C. lavaretus , L., Kroyer, Nilss. Siiki, Fin. 0. oxyr- 

 hynchus, v. B. Knubb sik, Nilss., p. 433. The Powan. 

 G. cepedei, Parn., Yarr., " British Fishes/' i. p. 314. 



This is the commonest species in Finland. Is met with 

 in great quantities both in the gulfs of Bothnia and Finland, 

 from whence they come up the rivers to spawn. General 



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