652 



AGNES I. M. ELLIOT. 



probably those of the eighth, ninth, and tenth myotomes — 

 the connection of the middle one with the ninth myotome is 

 quite clear. It is now possible to make a table showing the 

 connection of the segments found in the tadpole with the 

 nerves and vertebrae of the adult frog. 



Skel. 



No. 

 seg. 



Pre- 

 occip. 

 cart. 



Vert. 1 

 Vert. 2 

 Vert. 3 

 Vert. 4 

 Vert. 5 I 

 Vert. 

 Vert. 7 

 Vert. 8 



Vert. 9 



Dorsal arcli 

 fuses urosl^le 



Myo- 

 tome. 



iS'erve. 



None 

 Pres. 

 Pres. 



None X rootlet 

 lot vagus 

 ' C Post. 



None - rootlet 

 (.of vagus 



Rudy. 



Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pros. 

 Pres. 

 Pres. 



Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 

 Pres. 



Hypo- 



glossal 



II 



III 

 IV 

 V 

 VI 

 VII 

 VIII 

 IX 

 X 

 XI 



Distribu- 

 tion in 

 adult. 



Remarks. 



Mesohlast in front of 1st myo- 

 tome. 



Disappears by time limbs appear. 



Disappears by time cartilaginous 

 arches appear. May be de- 

 generating cells. (See Pig. 6.) 



Muscles, 

 tongue 



Brachial 

 plexus 



Brachial 



plexus 



Body wall 



Body wall 



Body wall 



Sciatic 

 plexus 



Sciatic 



Nerve and ganglion disappear 

 in adult — still present when 

 cart, arches are formed. 



First persistent spinal nerve. 

 Really Sp. II. 



luscles to less. 



plexus muscles to cloaca. 



Sciatic 

 plexus 



Pelvis 



