Archive image from page 21 of The descent of man, and. The descent of man, and selection in relation to sex descentofmansel02darw Year: 1871 8 SEXUAL SELECTIOX. [Part II. onct, was considered by Linnaeus and by many subse- quent naturalists as a distinct species; it is of a dingy Fig. 28.—Callionymns Ijra. Upper fifrurc, male; lower figure, female. reddish-brown, with the dorsal fin brown and the other fins Avhite, The sexes difier also in the proportional size of the head and month, and in the position of the eyes; ' but the most striking diftcrcnce is the extraordinary elon- gation in th
Archive image from page 21 of The descent of man, and. The descent of man, and selection in relation to sex descentofmansel02darw Year: 1871 8 SEXUAL SELECTIOX. [Part II. onct, was considered by Linnaeus and by many subse- quent naturalists as a distinct species; it is of a dingy Fig. 28.—Callionymns Ijra. Upper fifrurc, male; lower figure, female. reddish-brown, with the dorsal fin brown and the other fins Avhite, The sexes difier also in the proportional size of the head and month, and in the position of the eyes; ' but the most striking diftcrcnce is the extraordinary elon- gation in the male (Fig. 28) of the dorsal fin. The young males resemble, in stiucture and color, the adult females. Throughout the genus Callionymus,' the male is gcner- ' I have drawn up this description from Yarrcll's 'British Fishes,' vol. i. 1836, pp. 261,266. ' ' Catalogue of Acanth. Fishes in the British Museum,' by Dr. Gunther, 1861, pp. 138-151.
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