APPENDIX 



559 



iliac arteries ; spinal nerves, with calcareous concretions ; 

 ganglia and commissures of sympathetic chains ; rami com- 

 municantes ; sciatic plexus (Fig. 36). 

 Remove the roof of the skull and the neural arches. Harden 



Fig. 401. — The forepart of a frog's body dissected from the ventral 

 side, and stretched to display the organs. 



c.°L, Carotid gland; car., common carotid artery; cu., cutaneous artery; £./., 

 external jugular vein ; hy., hypoglossal nerve ; i.j., internal jugular vein ; La., 

 lingual artery; /./., left lung; Lv., lingual vein; lr., liver; md., mandibular 

 vein ; ffV., part of ovary ; p., pulmonary artery ; s.scp., subscapular vein ; scl., 

 subclavian vein ; sm., submaxillaris or mylohyoid muscle ; sf., stomach ; sy.a., 

 systemic arch; thr., thyroid gland; v., ventricle; IX., glossopharyngeal 

 nerve ; Xc, Xg., Xlar., Xp., cardiac, gastric, laryngeal, and pulmonary 

 branches of vagus nerve. 



the central nervous system by pouring on two or three 

 changes of 90 per cent, alcohol. Note : olfactory lobes, 

 cerebral hemispheres, thalamencephalon, optic lobes, 

 medulla oblongata, fourth ventricle, spinal cord (Fig. 38, I). 

 Remove the central nervous system and observe its ventral 

 side. Note : olfactory lobes, cerebral hemispheres, optic 



