8 



SEXUAL SEXECTIOX, 



[Part II. 



onet, was considered by Linnaeus and by many subse- 

 quent naturalists as a distinct species; it is of a clingy 



Fig. 28.— Callionymns lyra. Upper figure, male ; lower figure, female. 



reddish-brown, with the dorsal fin brown and the other 

 fins white. The sexes differ also in the proportional size 

 of the head and mouth, and in the position of the eyes ; " 

 but the most striking difference is the extraordinary elon- 

 gation in the male (Fig. 28) of the dorsal fin. The young 

 males resemble, in structure and -color, the adult females. 

 Throughout the genus Callionymus, 12 the male is gener- 



■ 



11 I have drawn up this description from YarrelTs ' British Fishes,' 

 vol. i. 1836, pp. 261, 266. 



12 ' Catalogue of Acanth. Fishes in the British Museum,' by Dr. 

 Giinther, 1861, pp. 138-151. 



