cells are of two kinds, both spindle-ijiiajjed ana scndinfj 

 their peripheral ends throuf^h the basement membrane of the 

 overlyinc epithelivun, to break up into brush-like termina- 

 tions just inside the delicate outer membrane of the epith- 

 elixim. These structures are shown in figs. 61 and 62,- 

 In fig. Gl, the two types of cells are shown, the larger 

 one to the left representing the type much less numerous 

 than the other, staining differently from them and pene- 

 ti'ating the osphradial mass to terminate centrally differ- 

 ently from the smaller, more numerous cells. The internal 

 or central connections I have not been able to determine, 

 but this much it seems justifiable to state. The osphra- 

 dial nerve from the anterior ganglion becomes so closely 

 associated with the respiratory nei^e, that it cannot be 

 stated that it alone supplies the osphadium. Also, the 

 large sensoiv cells penetrate through the osphradial mass, 

 and especially it cannot be stated that their connection 

 is v.'ith the osphadial nerve. 



These structures I have described in detail for two 

 reasons. In the first place, the epithelium of the ospha- 

 dium is usually described as consisting of colvimnar cells, 

 v/hich form the sensory part of the structure. This I have 



