426 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vOL. 45 



Romerolagus. Its different shape is shown in figs, i and 4, pi. xcvi. 

 The mesosternum consists of four distinct segments, the first two 

 subequal in length, compressed laterally ; the third segment is slightly 

 shorter, not laterally compressed ; the fourth segment is very short 

 and cartilaginous. The mesosternum, strangely enough, is quite 

 unlike that of Romerolagus, and closely resembles the mesosternum of 

 Sylvilagus. The xiphisternum is very short, much shorter than the 

 presternum, its anterior end considerably enlarged, its posterior end 

 not enlarged at all. Apparently only six pairs of ribs articulate 

 directly with the sternum. (Major, '99, pi. 39, fig. 18.) 



Upper Extremity. — Radius and ulna subequal. (Major, '99, pi. 

 38, fig. 28.) 



Species in the genus. — One, Nesolagus nctschcri (Schlegel). 



Nesolagus is apparently a well-marked genus, but unfortunately 

 I have seen no exaniples of it. The general structure of its skull, 

 radius, and ulna seems to associate it with Caprolagus. The an- 

 terior portion of its presternum is enlarged quite as in Romerolagus 

 and Ochotona. The upper check teeth apparently resemble those of 

 Brachylagus in the short non-crenate reentrant angles. 



Genus CAPROLAGUS Blyth 



1845. Caprolagus Blyth, Journ. Asiatic Soc. Bengal, xiv, 1845, p. 247. 

 1863. Lepus Blyth, Cat. Mam. Mus. Asiat. Soc. Calcutta, p. 133. 

 1867. Carpolagus Gray, Ann. Mag. Nat. Hist., xx, 3d sen, p. 225. 



1899. Caprolagus Major, Trans. Linn. Soc. London, 2d sen, vii, Zool., 

 p. 514, November, 1899. 



1900. Caprolagus Stone, Proc. Acad. Nat. Sci. Philadelphia, 1900, p. 462. 

 Type. — Caprolagus hispidus (Pearson). 



Geographical Distribution. — Along the foot-hills of the Himalayas 

 in northeastern India. 



Diagnosis. — Fur harsh, ears much shorter than head, tail 

 short. Skull short and heavy, rostrum stout, postorbital process 

 represented by small posterior limb only. Teeth essentially as in 

 Lepus except that the first lower premolar has two reentrant angles 

 on anterior face and one on the internal face of the anterior portion 

 of the tooth. 



I have seen no members of this genus, and the following account 

 has been taken from the published figures of the skull and teeth. 

 (Blyth '45, Major '99.) 



Skull. — The skull, as a whole, is rather short and heavy, moderately 

 arched, rostrum short and stout, nasals about as wide in front as 

 behind. 



