470 Proceedings of the Asiatic Society. [No. 5. 



now determined), to judge both from the degree of attrition of its molars, 

 and that of anchylosis, was a somewhat (but not much) younger animal 

 than the female Rambi, and considerably more mature than the adoles- 

 cent male Rambi : both of the former, however, had certainly attained 

 their complete growth, and we observe a marked difference in the propor- 

 tions of the limbs, which alone would go far to remove any doubt of the 

 distinctness of the two species. 



The extreme length of humerus of the adult male Pappan is 14^ in., 

 and of ulna 14^ in. ; in the adult female Rambi, respectively \A\ and 

 15 in. : femur of male Papuan lOf in. ; of female Rambi 11| in. : tibia 

 of former, 9^ in. ; of latter, 9f . 



The total length of pelvis in the female Rambi is 11 in. ; extreme breadth 

 apart of the ilia llf in. ; of pelvic aperture (measured behind) 3£ in. : the 

 corresponding measurements in the male Pappan being respectively 9f 

 in., lOf in., and 2| in. 



A more detailed comparison must be deferred until we can get the 

 female Rambi skeleton mounted. At present, we may remark that our 

 great Sumatran male Rambi skull (Yol. XXII, plates 1 and 2,) about 

 corresponds with Prof. Owen's great Bornean Rambi skull, figured in 

 Tr. Zool. Soc. Vol. 2, pi. 31 ; only that the supra-orbital ridges are less 

 flattened back, and the profile consequently is more concave : while the 

 Bornean female Rambi now received would correspond with Prof. Owen's 

 Sumatran (F) female, figured in Tr. Zool. Soc. Vol. 1, pi. 53, were it only 

 much older, and had it its sagittal crest developed ; its lambdoidal crests 

 are remarkably developed. In the adolescent male Rambi skull, it is 

 remarkable that the nasal bones continue distinct (which is unusual 

 in this genus, even in the half-grown animal) ; the two being but very im- 

 perfectly united, and the same is observable in our adolescent female 

 small Orang skeleton with comparatively short fore-arms. In our adoles- 

 cent male Rambi, the nasal bones do not ascend upon the glabella as in 

 our other Rambi skulls. 



2. T. C. Jerdon, Esq., Sagur. Specimen of a new Indian species of 

 Swallow, belonging to the group of ' Eepublican Swallows' (Petrocheli- 

 don of the Prince of Canino), and having similar habits to the well known 

 Hirundo fulva of N. America. The specimen is not a good one to 

 describe from, being not fully mature ; but its upper-parts should be glossy 

 black, with white lateral edges to the dorsal feathers more or less seen : 

 the rump brownish ; and crown dark rufous : lower-parts white, with black 

 mesial streaks to the feathers of the throat and breast ; the under surface of 

 wings pale brown: tail slightly furcate, with a slight whitish spot more or 



