The Digestive System 165 



under high magnification there is no noticeable 

 difference in the glands at the two seasons. 



Rathke has given the name of "Gescmack- 

 warzchen" to the conical projections found on 

 the dorsum of the crocodiHan tongue; they are 

 distinguished by their softness and thinner epi- 

 theHal covering from the cones that, in many of 

 these animals, bear the openings of the mucous 

 glands. 



These taste papillae generally have the form of a 

 truncated cone and often are surrounded by a shal- 

 low circular pit, outside of which, in turn, is some- 

 times a small low wall. They are distributed over 

 the entire dorsimi of the tongue, usually at con- 

 siderable distance from each other in comparison 

 to the size of the tongue, and are not so numerous 

 as the taste papillae of the MammaHa. Rathke 

 found their absolute number greatest in A. 

 lice ins. 



Rathke mentions other larger and harder pro- 

 jections on the tongue of certain Crocodilia which, 

 though not perforated by a mucous duct, he 

 thinks are of questionable relation to the sense 

 papillffi. They usually have more the form of a 

 flattened than of a truncated cone, and are very 

 numerous in some species. 



The Roof of the Mouth. In the paper mentioned 

 above the author notes that the papillae on the roof 

 of the mouth are evenly distributed and are more 

 distinct than those of the dorsum of the tongue. 



