335 



In number the teeth resemble those of the other species, but differ 

 somewhat in their form. Tbc outer lower incisors, although then 

 have the central principal cusp already mentioned, yd have itao little 

 developed that it would scarcely be regarded as singular if previous 

 notice had not been called to it*. The upper incisors present a re- 

 markable deviation from what appears typical : instead of two pain 

 of well-developed teeth, we find instead that the inner ones are long 

 ami pointed, but the outer ones merely rudimentary, bo thai thei 

 can scarcely he seen without the aid of a lens. The upper canine- 

 are long, strong, and angular ; and the premolar next to them i-> 

 also long and pointed. These differences in the teeth are alone suf- 

 ficient to distinguish this species. 



The following are the dimensions of the crania of these three 

 species : — 



K. picta. | A', tanosa. 



6 



Entire length of the skull exclusive of the 



incisors 



Greatest breadth across the zygomatic 



arches 



Breadth of the skull behind the zygomatic 



arches 



Length from the posterior root of the zy 



goma to the anterior point of the inter 



maxillary hones 



Length of the zygomatic arches 



Length of the bony palate 



Length of the dental series in the upper 



jaw 



Breadth between the outer cusps of the 



two posterior molars 



Breadth between the tips of the upper 



canines 



Length of the lower jaw, exclusive of the 



incisors ... . 



Klevation of the condyle above the lower 



edge of the ramus 



Length of the dental series in the lower 



jaw 



The following species, having the wing-membranes attached u 

 along the foot as to the root of the toes, have been placed by Dr. 

 Gray in this genus ; but their similarity to the species of other genera, 



* It is curious and interesting to note the very slight outward deflation from 

 the more typical forms, exhibited by this species, and to find on examination thai 

 it possesses also an internal departure from the same typical standard ; and it i- 

 satisfactory to find tbat these differences are such as accord well with each Other, 

 externally and internally. The slightly more bulky appearance of the animal, ac- 

 companied by membranes <>f less delicate nature, and more imperfect]] marked 

 with tin- veins and papilla which arc so characteristic of ibis .-mil the allied 

 genera, is associated with an otseoua -writi df greater solidity, and with upper 

 incisors which approach in their ineqnalit] "l SIM those of man] <>t" the species 

 >if tiie robust genus ScotophUut. Ifire examine, for Instance, the upper ini 



■ it the NQCtule nr the I Imri/-(!inu <l Bat, WC -hall pereei\e at onCC that the inm i 



"lies are much the largest, jost as they are in A'. fero*a\ ami in those stunt - 



of the L'eniis \ i spa-tilm which ha\e .i near altinit x with ScotOpkiktt, thf 

 thing is observable. 



II 



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A', (prosa. 



