MAMMALIA. 4(57 



total 30 or 36. Ears larger than the head, often much deve- 

 loped; united together at the base; with four or five superior 

 molars, and from four to six inferior on each side. In other 

 respects they agree with the Vespertilio. 



Plecotus auritus. — The Long-Eared Bat. — Plate VI**. 

 fig 2. — Ears almost as long as the body; fur gray, deeper above 

 than below ; body nearly two inches long ; expanse of wings 

 eleven or twelve inches. Inhabits Europe, and is common in 

 Britain. 



M. Rafinesque has proposed two other Genera of the Bat 

 tribe, namely, Hijpexodon and Nycticeius, but he has not yet 

 given satisfactory characters of these Genera. 



Genus 32. — Atalapha. — Rafinesque. 



Generic Character. — Without iiicisory teeth ; nose simple ; 

 ears separate, and provided with auricles ; tail long, extending 

 beyond the interfemoral membrane, or comprised in it. 



Atalapha Americana. — The New- York Atalapha. — Ears 

 broad, short, and rounded ; tail encompassed by the interfemo- 

 ral margin. Inhabits the State of New- York. 



Family II Insectivora. 



Four extremities formed for walking ; three kinds of teeth ; 

 stomach simple and membranous ; intestines short. 



The grinders are furnished with various sharp points ; the 

 canine teeth in some species very long, in others short, in which 

 case they are termed false cheek teeth, or grinders; the incisory 

 teeth varying also, both in number and length ; teats ventral, or 

 both ventral and pectoral ; legs short ; mode of locomotion 

 always plantigrade ; ail the feet pentadactylous, except in one 

 species. 



Tribe I. 



With long incisors in front, false canines, not longer than the 

 grinders. 



Genus 33. — Erinaceus. — Linnceus. 

 Generic Character — Incisory teeth 6, canines J-J, molars l^* ; 

 total 34 : the intermediate upper incisory teeth separate, and 

 are of a cylindrical shape ; the canine teeth are smaller than the 

 grinders ; the body is thick, covered with prickles on the back 

 and sides, and on the belly with long, stifl", tubulate hairs; the 



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