774 



XOTES OX TEE VAMriRE BAT- ALLEN. 



VOL. XVIII. 



The 



a wavy contour suffgestiii^ tlic presence of a trilobed cutting edge, 

 single molar is a minute conoid nodule. 



Lower teeth.— The incisors large, pectinate, the central tuice the 

 size of the lateral. The centrals are a])parently with scarcely any 

 alveoL-p, being seen in their entire length in the pit back of the mentuni, 



rpi.rti..nof sk 



Fig. 2. 



t^KL'LL.s OF DIPHYLLA AND DESMODUS. 



ill of [,1 ) IHphtilbi ecawlnfil ;in.l (h) Desmnrlus ru/iis ; v.evveil trr 



While but little of the socket- wall is visible from in front. The canines 

 exhibit small heels, which give at tirst sight the impression that an 

 interval exists between the canines and the first premolars, but close 

 inspection shows that the teeth are contiguous. The premolars com 

 pressed laterally with shar}) knife-like edges: tirst premolar twice the 



Fig. 3. 



PALATES OK DIPHYLLA AND DESMODrs. 



Hard palate and teeth of upper jaw of («) DiphyUa ecaudata and (/,) Ursmodus r„/,t« ; viewed IV... 



size of the second, and the third more than twice the size of the tirst. 

 Thus the four teeth are alternated in size, the tirst being larger than 

 the second, the third larger than the fourth. The third ])remolar is 

 obscurely trilobed: the others are simple. 

 Palatal rugic six. 



Fig. 4. 

 LOWEIt JAWS OF DIPHYLLA AND DESMODUS. 



Hnr,jontal ramus „f lower jaw an.l leethni (a) mpln/lla rciudatu .ind [h) Desmodns rufu^. v.ewed lro,„ ai,..>e. Six time.s natural size 



^/cmZ/,— Neither of the skulls- of the specimens examined were com- 

 plete; one, indeed, was in fragments The following notes have been 

 made in comi.arison with the skull of Jh'smodux. It will be seen that 

 the statement of Dobson that the skull of 7>/>%//.fresembles Besmodus 

 is not sustained. 



