. Soft tissues of upper jaw 

 ■ Soft tissues of lower jaw with germs of teeth 

 •'Glossohyal 

 • Hvpohyal 



"'Copula' visceral arch III 

 - Meckel's cartilage (visceral arch I) 

 "Ceratohyal 



Meckel's caitilage 

 Ceratohyal 



"Gills, I, II. Ill 

 Truncus arteriosus 

 Ventricle of heart 

 Auricle of heart 



Inferior cardinal veins 



, Gill cover 



. Cartilage of pectoral fin 



Yolk 



Pancreatic tissue and bile ducts 



JE ) The two intestines just beyond the stomachs 



Single portion of intestine formed by junction 



ot the two former 

 Wolffian body 

 The two notochords 



Mesial muscular mass 

 Lateral muscles 





^4. — Horizontal section i - as the last. 



double 



Composite spinal cord, much drawn out 

 transversely 

 ■■' The two notochords 



■•• Inner neural arch cartilages 



• Haemal arch cartilages 



- Aort.u 



:: m bodies 



Mesial muscular mass 



Lateral muscles 



The two notochords 

 Spinal cord 



in th 

 ly curved portion behind 



its proximal 

 nd is obvio;.- hile the 



th regions ha 



i ichords is v. 

 ;mei 

 i 



J. F. G. 



PL. Xtfvh 



