LASIURrS. 



23 



The slioiildev tuft is inconspicuous ; on the membrane above the 

 elbow there is a small whitish spot of hair. 



Membranes very ample. Thumb large. Foot moderate. 



Fig. 20. 



^^'^. 



Skull— Bro&d and high, 

 wards. • 



Palate sloped considerably back- 



Molars —. Canines — Incisors 



5 1 t. 



Dentition. 



2 



1 5 



Canines _- . Molars _=32 teeth. 

 1 5 



Upjjer Jaw.— Incisors stout, short, wide apart. Canines large 

 and simple. First premolar very minute, wedged in between 

 the canine and second premolar, which is large and pointed. 

 Last molar compressed antero-posteriorly. 



Loiver Jaw.— Incisors bifid, but not much crowded. Canines 

 with a small anterior cusp. Molars as usual, first smaller than 

 second, which is not inclined so much anteriorly as in the pre- 

 ceeding species. 



This species, since the date of Mr. Say's description, has 

 generally been known as V. pruinosus, until Major Leconte 

 claimed for M. Palisot de Beauvois the priority of the name 

 V. cinereus, as described by him in the Catalogue of Peale's 

 Mus., Phila., as early as 1796. This very rare pamphlet had 

 evidently been overlooked by Mr. Say, and having been so fortu- 

 nate as to find a copy in the library of the Phila. Academy I have 

 no doubt that the description of Palisot de Beauvois is intended 

 to apply to the species now under consideration. ^ 



See Appendix. 



