Fri;. 13. Trausvir- 

 through head of normal trout 

 (PI. I. fig. i), sho, 



> ( M . 



PI. VIII !li 



,nd P>. M r ("' 



meili." cc 



I. I. fig. i. ( -->5-) 



Mucous canal 

 Pineal body 

 Supraorbital bar 

 Cavity cerebral lobes 



Cerebral lobes 



Obliquus oculi superior 

 .' Retina and lens 

 Rectus oculi internus 



Trabeculae cranii 



Palato-pterygoid bar 

 'Copula visceral arch II 



Visceral arch I 



Cavity optic lobes . ^ 



Optic lobes 

 Supraorbital bar . . TJ 



Rectus oc. superior 



Ventricle III 



Optic recess 



Retina and lens -- 

 Rectus oculi internus .. 

 Trabeculae cranii 

 Nerve II 

 Palato-pterygoid - 



Copula visceral arch II 

 Visceral arch I - 



KlO. 14. Transverse section 

 through head of normal embryo (as 

 in last figure), across anterior part of 

 optic lobes and entrances of optic 

 nerves. Compare with PI. VIII. fig. 

 36 (union at optic lobes), and with 

 PI. XIV. fig. 50 (union at medulla). 

 For other references see under PI. I. 

 fig. '. <x'5-> 



Cavity optic lobes 



Optic lobes 



Mucous canal 



Supraorbital bar 



Ventricle III (infundibulum) 



Retina 



Nerve II 



Rectus oculi internus 

 Trabeculae cranii 

 Rectus oc. inferior 



Palato-pterygoid bar 

 Mouth cavity 

 Visceral arch II 

 Visceral arch I 



Cavity optic lobes 



Optic lobes 



Sylvian aqueduct 



Supraorbital bar 



Nerve III 



Infundibulum 



Recti oculi intern, super, and infer. 



Trabeculae cranii 



Palato-pterygoid bar 



Visceral arch 1 1 1 



,, II 



I 



Copula visceral arch IV- 



! !*. I. I 





]. F. G. 



PL. 



