486 



Zoological Society : — 



The following are the dimensions of the crania of these three 

 species : — 



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 



gonia to the anterior point of the inter 



maxillary bones 



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 



Rlevation of the condyle above the lower 



edge of the ramus 



Length of the dental series in the lower 



jaw 



The following species, ha^ang the wing-membranes attached as far 

 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, 

 or minor groups, has induced me to leave them out of the present 

 monograph. Keiivoula formosa I have already separated from it, 

 and placed in company with the Vespertilio emarginatus of Europe, 

 and some other species. K. Sykesii is a small species, closely allied 

 to, if not identical with, Scofophihis coromavdelicns ; and K. j^oeiisis 

 and K. (jrisea are both referable to the same subgeneric division of 

 the genus Scotophilus, all having characters pretty similar to those 

 of the S. Pipistrellus, S. Kuhlii, and 5'. marginatus. K. trilatoides 

 is a true Vespertilio, having the same generic peculiarities as Vesp. 

 mrjstacinvs. K. brasiliensis I have not seen. 



In a former monograph I gave a few notes on the classification of 

 some of the species of Vespertilionidce ; and I seize the present op- 

 portunity of adding such others as bear on the same point, which 

 nave arisen during the examination of the species comprised in the 

 present memoir. 



The observations I made were something to this purpose, — that 

 after eliminating such easily recognizable genera as Plecotus and 

 Barbastellus from the genus Vespertilio, as given by M. Temminck, 

 there yet remained a large number of species differing greatly from 

 each other, but the most diverse of which viere so connected by 

 intermediate species as to be with great difficulty brought under 

 generic definition. The common Noctule Bat and the Whishered 

 Bat were given as familiar examples, the first being considered as 

 typical of the stout species which are organized for strong and rapid 



