HuBER, Sensory Netve-fibers in Visceral Nerves. 147 



with reference to this point I may mention the following: Blad- 

 der of the frog, cat and rabbit, in each of which terminal 

 branches of arborizations could be traced into the epithelium ; 

 also in the urethra of cat and rabbit. In the preparation from 

 which the figure was made, here and there intra epithelial nerves 

 were found, although in that portion of the preparation from 

 which the figure was drawn, very little epithelium remained ; I 

 assume, therefore, that not nearly all the terminal branches of 

 this one fiber are shown in the figure. I believe I am warranted 

 in drawing this conclusion by reason of the fact that in other 

 parts of this preparation much more branched arborization may 

 be seen, some of the terminal branches of which end in the 

 epithelium. In a number of methylen blue preparations of the 

 ureters of the cat and rabbit, which I have recently made for the 

 purpose of ascertaining the mode of ending of the large medul- 

 lated fibers found in their connective tissue sheath, I find plexuses 

 of varicose fibers in the mucosa, thus inside of the muscular layer, 

 the cells of which are usually stained. In a number of prepar- 

 ations only partly stained, here and there arborizations with 

 long, slender filaments were seen in the mucosa, some of the 

 terminal branches of which I was able to trace into the epithe- 

 lial lining, this especially in preparations examined before fix- 

 ing. In the uterus of the cat and rabbit, arborizations were 

 found in the mucosa under the epithelium and in a number of 

 these, some of the branches of such arborizations were clearly 

 above the capillary plexus found immediately under the epithe- 

 lium, and were on a level with the gland mouths, the cells of 

 which seemed to stain more readily than the epithelial cells lin- 

 ing the uterus. (In these preparations, as sometimes happens, 

 the endothelial cells of the capillaries were stained so that they 

 could be followed nearly as well as in an injected preparation.) 

 It seemed to me that some of the terminal branches of the ar- 

 borizations were to be found in the epithelium. There is, how- 

 ever, room for error on this point as the thickness of the epi- 

 thelium is such that by focusing it may not be possible to de- 

 termine whether the terminal branches of the arborizations are 

 in or under the epithelium. In the gall bladder and bile duct, 



