B 7 » 



10 11 12 W « 



encoaerm 



Plate I. Diagrams 



tes; the b ' ' 



Ac. 



a. p. 1 



can. med.r 



cr. 



gr. H. 



m. 



m. tymp. 



near. a. 



np. 



oc. 



occ. a. 



olf. 



pr. mand. 



Sc. 



sp. 



stom. 



1, 2, 3, I 

 (According to VT 

 the scheme given I 

 Anura where the \ 

 first myotome beloi 



Annelid. 



can. med. 

 > '' 1 10 11 12 13 14 



Amphibia. 



(Necturus) 



5c. Ac. 



8 9 10 11 12 13 14 



Selachii. 



(Scyllium 

 Acanthias} 



6 7 



9 10 11 12 13 14 



Amniotes. 



(Lacarta) 



