1878.] ON A COLLECTION OF CHIROPTERA. 873 



smaller than the third; molars acutely tubercular, with W-shaped 

 cusps. 



Length (of the type specimen, an adult male), head and body 

 2" # 3 ; tail 1"'9, tail free from membrane 0"*6 ; head0"85; ear 

 1"'3, tragus 0"'25 ; forearm 1"*85; thumb 0"-3; third finger— 

 metacarp. 1"5, 1st ph. 0"'7, 2nd ph. 0"- 75, 3rd ph. 0"'55 ; fifth 

 finger— metacarp. l"-5, 1st ph. 0"'5, 2nd ph. 0"-5 ; tibia 0"7; 

 calcaneum 0"*6 ; foot 0""3. 



Certain peculiarities in the structure of this very remarkable 

 species recall similar peculiarities in Thyroptera tricolor, and have 

 evidently resulted from adaptation to the same purpose. Thus in 

 these two species alone are the toes united to the base of the claws, and 

 in them alone, among all known species of Bats (except the Phyllo- 

 rhinincs), have the toes an equal number of phalanges ; they also, in 

 the possession of a third phalanx in the middle finger, differ from 

 all the species of Vespertilionidae, and from those of the allied 

 families. This species, however, differs remarkably from Thyroptera 

 tricolor in the structure of tbe adhesive disks, in the presence of a 

 well developed metacarpal bone of the second finger, in the form of 

 the head and ears, and in dentition, and must undoubtedly be con- 

 sidered the type of a distinct genus of Vespertilionidse. 



As remarked above, the adhesive pads are evidently less perfect as 

 clinging-organs than the corresponding parts in Thyroptera tricolor, 

 and occupy, in this respect, an intermediate position between those 

 of that species and of Vesperugo pachypus. 



It is probable that this species (in common with the few other 

 species of Bats provided with such accessory clinging-organs) uses 

 the adhesive pads in sustaining its hold on the smooth hard stems 

 and leaves of palms and of other hard-wooded trees 1 . 



12. Notes on recent Additions to the Collection of Chiroptera 

 in the Museum d'Histoire Naturelle at Paris, with 

 Descriptions of New and Rare Species. By G. E. 

 Dobson, M.A., M.B., &c. 



[Keceived October 28, 1878.] 



Through the kindness of M. Alphonse Milne-Edwards I have 

 lately been permitted to examine and describe the valuable additions 

 to the collection of Chiroptera in the Museum d'Histoire Naturelle, 

 made by various collectors since my last visit to Paris in 1876. 



The collections, from which the specimens which form the sub- 

 ject matter of this paper were derived, were made chiefly in the 

 islands of New Guinea and New Caledonia, in Siam, in Africa and 

 Madagascar, and in Central America. The species may therefore 



1 See my 'Catalogue of the Chiroptei-a in the Collection of the British 

 Museum,' p. 444 ; also ' Nature,' vol. xviii. p. 585. 



