ALLEN : NOTES ON CHIROPTERA. 



29 



The peculiar short, broad rostrum, and nasal bones, correlated with tlie slightly 

 more crowded tooth row, as well as the lesser size of this bat, distinguish it readily 

 from P. giganteus of the Indian mainland, which is doubtless its nearest ally. 



Pteropus ualanus Peters. 



Specimens of this bat seem to be rare in collections, so that it is desirable to 

 include measurements of two males, Nos. 3272, 3273, alcoholic, from Strong's 

 Island, Caroline group: ear, 23.4, 24; forearm, 130, 126; thumb, 57, 57; 2d 

 digit, 92, 93.5 ; 3d digit, metacarpal, 93, 89.5 ; 1st phalanx, 65, 63 ; 2d plialanx, 

 96, 91.5 ; 4th digit, metacarpal, 90, 88 ; 1st phalanx, 53.3, 53; 2d phalanx, 57.5, 

 55.3; 5th digit, metacarpal, 94,93; 1st phalanx, 41,41; 2d phalanx, 42, 39; 

 tibia, 56, 57 ; foot, 34, 35. 



Cranial measurements: greatest length, 62, 61 ; basal length, 55, 53.6; inter- 

 orbital constriction, 7, 6.3 ; zygomatic breadth, 39, 35 ; mastoid breadth, 22, 21 ; 

 mandible, 48.5, 48; maxillary tooth row (exclusive of incisors), 22.5, 22; man- 

 dibular tooth row (exclusive of incisors), 24.7, 26. 



EMB ALL ONURID AE . 

 Emballonura nigrescens (Gray). 



Four specimens, collected by Mr. Thomas Barbour in Ternate, Moluccas, 

 measure as follows : 



MEASUREMENTS OF EMBALLONURA NIGRESCENS. 



Rhynchiscus naso (Wied). 



As pointed out by Miller, the Old World genus Emballonura is the most prim- 

 itive of the family, and tbe only one possessing two permanent upper incisors on 

 each side. It is therefore interesting to find that in a large embrj'o of Rhynchis- 

 cus naso, from Porto Seguro, Brazil, there are 2-2 upper milk incisors, and in a 

 series of nine adults from the same locality, three (Nos. 4212, 4217, 4219) have 

 what appears to be a persistent upper milk incisor on the outer side of each per- 

 manent incisor. These persistent teeth are so large as to appear like functional 



