38 Mr. K. Aiulerscn on the Bals of (Jie 



remarks on //. Sirinhoei make mc suppose tliat lie regarded 

 it as an unrecorded species, because he compared it not with 

 H. nrmifjcr, bnt with H. diadema. 



Remarks. — There is only an average difference between 

 the southern and n rthern race of H. armiger. In the latter 

 the skull, nion* especially the facial region, is generally a 

 little lieavier built, the tooth-rows a triHe longer. The ex- 

 ternal difference is still less pronounced. The two races, 

 perhaps, meet somewhere in Burnudi or Assam. 



2. llipposiderus turjj'is, Bangs. 



Hippoxiderm turpis, Outram Bangs, Amer. Naturalist, xxxv. no, 415, 

 p. 5(31 (July 1901). 



Diaf/nosis*. — Forearm about G7'2-717 mm. 



The skull is an exact miniature copy of an armiger skull. 

 So far as I can make out from dried specimens (by re- 

 softening the nose-leaves), there are three leaflets only, 

 •without any trace of a fourth. Tlie fourth metacarpal is, 

 more often than in armiger, a trifle longer than the third. 

 These are, I believe, the only external differences as com- 

 pared with armiger, apart from the much smaller size. 



Range. — As yet recorded only from Ishigaki^ S. Loo-ehoo 

 Islands. 



II. — The Hipposidervs CoMMEitsoyiTwY.. 



The general shape of the skull much as in the diadema 

 type. Xasal swellings distinctly inflated, as in diadema (not 

 flattened, as in uriuiger). iSaso-frontal region broader, 

 especially posterioily, and more pronouncedly pentagonal in 

 shapCj both of these peculiarities chiefly due to the somewhat 

 more projecting postorbital processes (in diadema and its 

 allies the postorbital processes are smaller and more rounded, 

 off). A small facial foramen, situated in the middle line 

 between the posterior nasal swellings. Sagittal crest more 

 strongly, sometimes (viz. in H. gigas) enormously, developed, 

 crescent-shaped, gradually descending in front towards, and 

 merging into, the supraorbital ridges. Lambdoid crest 

 stronger than in diadema. The rami of the mandible higher. 

 There is scarcely anv other essential and constant difference 

 between the skulls ot the diadema and Commersoni types. 



* 13 skins, with skulls, examined. — For the loan of 9 of these speci- 

 mens I am indebted to the Authojities of the Museum of Comparative 

 Zoology, Cambridge, Massachusetts;. 



