34 FLATFISH I'.S (HETEROSOMATA) 



closely rt-latfd /'. yadula, however, the spines are about equally developed in botli 

 sexes and some of the dorsal and anal rays are prolonged in the female also, although 

 these are less elongate than the corresponding rays in the male. 



'Bothus podas. M.ilc and female, (xj.) 



nd feuiak-. ( i.) 



Frequently the development of rostral or orbital spines is accompanied by a sexual 

 difference in the width of the interorbital region. In such genera as Syaciiim, Citha- 

 yichthys [cornntus], Perissias, Engypfosopon, Crossorhombus and Parabothus, the inter- 

 orbital space is wider in the male, but this curious feature attains its maximum 

 development in certain species of Bothus (= Platophrys auctt.). The greater width of 

 the space between the eyes in the male is most marked in mature individuals, and in 



