﻿gill] 



l.Il I. HIS fORY "l I in 



513 



The nexl noteworth) stage in developmenl i- in thi >f per- 



fecting the tin-, especially the rays, and the isolation of the three 

 foremost dorsal rays and their advance forwards so that the 

 arises from the snout. Th< appendages arc ently 



developed along the jaw 



and opercular apparatus, and the dorsal spin< »y tl 



Fig. 103. — Young angler with most of the characteristics of adults but larger 

 pectorals and ventrals, and less flattened head. (After Riippell.) 



little angler is two or three inches long. The ventrals are still \ 

 long but all the rays are developed and the head and body have not 

 yet assumed the much depressed form charact f the adult. 



When the young fall to the bottom they are supposed " to fre- 

 quent rocky alg^e-covered ground where they can have a shelter and 

 also suitable food." Few are ever taken by the dredge or trawl ■ 

 in ground where the old are abundant. It is only when they become 

 older that most of them leave such secluded nooks and come 

 into the open. 



The growth of the angler has been especially studied by T. Wemyss 

 Fulton C1903) based on the examination of large series. When six 

 months old., the " mean " length is 6-}i inches > = ■ hen '" 1 



year and 6 months." it is i2 l / 2 inches (9-1 5i|), and "when 2 

 years and 6 months." it is i8-i8>£ inches 1 14J-21-22 



•" When 3 years old. supposing a little less than the same rate of 



