SidWKLL, Xi'f'-'rs in the J~)o?nestic Cat. 309 



Fig. CI.), the peripheral 5 mm. being parallel with its plate- 

 trope. 



NN. COCCYGEI. 



The coccygeal nerves are seven or more pairs, and with 

 the exception of the first (cephalic) one, innerve the caudal 

 muscles and integument. They decrease in size caudad, until 

 it may be questioned whether the extreme filaments are 

 properly designated nerves. The ectal root fibres are 

 attenuated and the dorsal ganglion is hardly distinguishable 

 caudad of the seventh; hence I have mentioned the number 

 as seven. Like the other spinal nerves, they divide into 

 dorsal andventral divisions; tlie dorsal innerve the dorsal 

 muscles and integument and form the roots of a single nerve 

 trunk, 



N. DORSALIS 



(Fig. dor.?), caudad of the seventh caudal vertebra, whose 

 filaments innerve the adjacent structures. JVie ventral divi- 

 sions join their fellows to form a ventral nerve trunk, 



N. VENTRALLS 



(Fig. vent.?). The rami of the ventral trunk have a two-fold 

 distribution; the first ramulus innerves the ental or the 

 inter- vertebral muscle (Fig. M. ent.),and midway between 

 the several pairs a ramulus innerves the ectal muscle of 

 the tail (Fig. M. ect. ). The plan of formation of the 

 dorsal and the ventral caudal nerves is seen in the diagram 

 (Fig. B). 



N. COCCYGEUS CEPHALICUS. 



The first coccygeal nerve has a distinctive distribution, 

 and requires a separate description. The ventral division 

 separates into a ventral and a dorsal or caudal branch. The 

 ventral branch becomes the anastomotic loop to the third 

 sacral nerve, the coccygeal or principal root of the 



