EXPLANATIONS. 



A number placed after a man's name refers to the list 

 of authors given in the back part, but if placed after the 

 name of an animal, as Amblystoma punctatum (14), in- 

 dicates that in the work cited, in this case, De Kay's 

 Natural History of New York, a drawing of the whole, 

 of some part, of the animal will be found. 



Narial valvules, a term not generally used, refers to 

 two small hemispherical swellings upon the tongue, 

 which are fitted to the inner nares. 



