Hunter, Nenwiis System of Molgula. 205 



many other cells not selected by the blue and frequently cells 

 are stained blue to which no nerve supply can be demonstrated 

 so we cannot say anything definite with regards to such selec- 

 tive staining as mentioned above. The same type of ciliated 

 cells with a like type of ending is found in the branchial basket 

 on the borders of the stigmata. (See Fig. 2.) 



The nerve fibers supplying the ciliated cells bordering the 

 endostyle and peri-pharyngeal bands are applied rather closely 

 beneath the epithelium, in many cases forming a true plexus of 

 anastomosing fibers. It may be said however, that this plexus 

 is limited to the fiber after it breaks up under the basement 

 membrane to form the endings. 



The endings appear to be disk, cup or knob like. Some- 

 times only one knob is found in contact with the base of a cell, 

 sometimes several ; the trefoil ending was infrequently found. 

 Frequently the endings appear to be free. (See Fig. 3.) 



Fig. J. Nerve endings on the ciliated epithelium of the peri-pharyngeal 

 band. Rounded surface seen in optical section, whole mount. 1-12 imm. Oc. 

 6 (Zeiss). 



In the branchial basket the fibers do not always remain 

 closely associated with the basement membrane, but may follow 

 the supporting tissue in the sinus-like interior of the branchial 

 bars. (See Fig. 2.) Here the endings are not limited to cili- 



