( 396 ) 



the lötii and IV*^ vertebrae, the caudal one at the IS^ii vertebra against the 

 mid-dorsal line (fig. I, 1 and 5). 



d The ventral part of the caudal zone is shaped like a rectangular 

 triangle, having its hj'pothenuse along the plica axillaris posterior, and 

 forming an outward curve in the direction of this latter (see fig. I, 2, 1 and 5). 



To the kft are found two insensible spots. One of these, opposite the 

 sensible ventral portion to the right, is elliptic and advances obliquely 

 towards the axilla (see fig. I, 2 and 3). The other, likewise elliptic, has its 

 longitudinal axis almost perpendicular to that of the first, this latter 

 being confluent with the plica axillaris posterior (see fig. I, 3, 4 and 5 to 

 the left). 



Fi-. I. 



lltii root. 



Dog VI. 11^^^ root isolated to the right by 



cutting through the 7^^, 8*^, 9^^, lOtn, 12'^, \?,'^ and 14^^ 



roots, and cut through to the left. 



The lO^h dermatoma. 



On September W^ 1902 on a strong male dog, designed as dog IV, by a 

 similar operation as on dog VI, the 6^1^, 7* 8'h gth^ ntn^ igtu and 13'i» pair 

 of roots to the right is cut through. To the left the W^ is cut through. 



Autopsy on September 24^^ confirms this having been performed. A repro- 

 duction of the results found on Sept. 22'^ is given in fig. II. 



