

er evidence 



other struct;. 

 genera 





■.•low the 



The 



'1 and of cei 



i acts. For 



United inner supraorbitals 



Outer supraorbital-- . 



Cavity of cerebral lobes ■-- 



An outer eye - ■- 



Ventricle 1 1 1 — 



Outer supraorbital 



Optic lobes - — " 



Periotic cartilage _.. 



Ventricle IV 



Parts of labyrinth 

 -Medulla- 

 United haemal arch cartilages. 



Mesial muscular mass--'" 

 Composite spinal cord •-"" 



United inner supraorbitals 



^\^^\%JC\ Outer supraorbital 



•]- x" - "__^T Cavity of cerebral lobes 



v^K^V / / ^ — )] \ "Rectus oc. int. 



'Ventricle III 

 ' Optic lobes 



' Periotic cartilage 



i^ f77 " Ventricle IV 



/1K*\ J Parts of labyrinth 



j) |K3l] Medulla 



' Parachordals 



'The two notochords 



'Mesial muscular mass 



'Outer series of muscle segments 



"" Composite spinal cord 



Inner olfactory organs 

 Olfactory cartilage 

 United inner eyes and lens ••- 



An outer eye . . . 



Rectus oc. sup. ., 



Rectus oc. ext. .. 

 The two infundibula and .." 

 their outgrowths 



Hyomandibular ... 



Upper parts of gill arches . 



The two notochords 



and their parachordals 



Oesophagus 



ginning of the two air ducts 



Head-kidney . . 



The two notochords — 



The composite spinal cord . 



Fig. 45.— It 

 at a deeper level 

 olfactory pits 

 middle of th< 

 fundibular outgrow 

 bladders. (X14.) 





,011 of the < ■ 



' 

 1 



Inner olfactory organs 



- Olfactory cartilage 



.- Obliquus oc. inf. 

 . Rectus oc. sup. 



- Optic nerve 

 ■ Rectus oc. ext. 



The two infundibula and 



their outgrowths 

 Hyomandibular 

 The two notochords and 

 their parachordals 

 .-•■-■ Upper parts of gill arches 



Beginning of body cavity 



Beginning of stomach 

 Part of liver 



Lateral muscles 



■■-• Mesial muscular mass 

 The two notochords 



• The composite spinal cord 





J. F. G. 



PL XII. 



XII 



