438 



THE DESCENT OF MAN 



Saville Kent remarks that this "singular appendage appears, 

 from my observations of the species in confinement, to be 

 subservient to the same end as the wattles, crests, and other 

 abnormal adjuncts of the male in gallinaceous birds, for the 

 purpose of fascinating their mates. ' ' " The young males re- 

 semble the adult females in structure and color. Through- 



Fig. 29. — Callionjmma lyra. Upper figure, male; lower figure, female, 

 N.B. — The lower figure is more reduced than the upper. 



out the genus Callionymus," the male is generally much 

 more brightly spotted than the female, and in several spe- 

 cies not only the dorsal but the anal fin is much elongated 

 in the males. 



The male of the Coitus scorpius, or sea-scorpion, is slen- 

 derer and smaller than the female. There is also a great 

 difference in color between them. It is difficult, as Mr. 



" "Natijre," July, 1813, p. 264. 



" "Catalogue of Acanth. Fishes in the British Museum," by Dr. QOnther, 

 1861, pp. 138-161. 



