35. 



together by connecti-"-e tissue, can be removed. Study of these 

 preparations, of Mtr.icli I have :made nearly 30, shoW the usual 

 form of tlie otocvstic canals to be cylindrical and of a uniform 

 size for aboiit three-fourths the length of the otocystic nerves, 

 figure 21; ot, at 7/hich point theire is nearly always a swelling, 

 beyond which there continues a thin strand of fibrous tissue, 

 probably connective tissue. At the distal end of the swollen por- 

 tion of each canal there is generally, probably always, a wall 

 that can easily be seen in dissected preparations, and has been 

 verified in sections. This wall is the rounded end of the 

 otocystic canal. 



Sometimes one or more little closed patch e g are found, 

 lying in the strand of tissue that is continued on past the swol- 

 len portion of the canal ^ 



^ Two such pouches are shown in figure 22, which repre- 

 sents the distal swollen portion of a canal and part of tlie con- 

 tinuing strand of tissue. These pouclies, when foimd, shov^ the 

 same structure that is shoiTO. by the canals, and like them are 

 lined with niLmerous verj?- long cilia. 



It seems to me that these walls and pouches sh-ovr con- 

 clusively that in each of the several cases tiie whole canal has 

 been removed send, in this species, that the canals do not reach 

 the surface of the foot. 



