with union 



■•- Optic lobes 



■■ Cavity of optic lobes 



Supraorbital bar 

 "" Commencement of iur 



\- H >: 



''" 7) \ Rectus sup. and inf. 

 j\ / '",.[ _^' j Lens and ret 

 ']•©'' " " V — '~>?< '' ' fibecular unit 



-^ X" W-?/ Pituitary space of right twin head 



^■sr zy 



— Tgy .... A^-j ' '" " Palato-pterygoid bar 



1 \£ ISfy -* . '^J' ' Inner trabecular units, fused 



//$ I ) <X' Visceral arch cartilage III 



I (Meckel's) 



Il(hyoid) 



"" Copular cartilage IV 



ted in '.' 



Periotic cartilage 

 (posterior end) 



Posterior end of composite medulla 



Lateral muscle segments 



^ %, y \ Outer parachordal bar 



sQ .-- ,.\ Inner parachordal bar 



The two notochords 

 The two aortae 



" /-0 ./... -\'\ - Ganglion of vagus 



£j£*^- /fa" 'VI J u g u l ar ve ' n 

 Pharynx 

 c?r u ' The last visceral arch cartilage 



■<n 



Sinus venosus 

 (.l/j- ^ \~ Cartilage of pectoral girdle 



"•• Auricle 

 Volk 





J. F. G. 



PL. I,*. 



