3IO Journal of Comparative Neurology. 



N. COCCYGEUS 



(Fig. N. coc.) to the muscle by the same name, one root of a 

 nerve to the urocyst (Fig. Uro. ) , and one root of the nerve to 

 the ribband muscle ? (Fig. M.?). 



RECAPITULATION. 



The cat is a good type for the study of comparative 

 anatomy. The nervous system offers special advantages, as 

 a basis of comparison, for establishing homologies, for iden- 

 tification, etc. 



Zootomy should precede anthropotomy in the collegiate 

 and the medical curricula. 



Preparation. — Injection of arteries and veins with starch 

 injection juass. 



Posture. — Ventri-cumbent, head sinistrad. 



Exposure. — By reflection of integument over caudal 

 thorax, sinistral side, beginning with removal of neural arch 

 of caudal thoracic vertebra; dissection caudad. 



LUMBAR NERVES. 



Characters in common: Paired; dorsal and ventral divi- 

 sions at ectal origin; related with sympathic system; muscu- 

 lar and cutaneous in distribution; two groups, cephalic four 

 not involved in lumbar plexus, caudal three so involved; the 

 cephalic group innerve muscles and integument of back, 

 MM. psoas, phrenicus, abdominis entalis, ectalis, transver- 

 salis and rectus, and the abdominal integument. 



N. Genito-cruralis. — Origin: Fifth and sixth lumbar 

 nerves, two roots. Distribution: Crural division, integu- 

 ment of caudal meros, and proximal crus; anastomoses with 

 N. N. cutaneus ectalis; genital division, plexus at ilio lumbar 

 artery, hypogastric and ventro-perineal integument. 



N. Cutaneus Ectalis. — Origin: Loop and sixth lumbar 

 nerve, trvo roots. Distributio7i: Integument of hip and thigh, 

 joins last described nerve. 



