180 Bulletin American Museum of Natural History. [Vol. XIX, 



difference in dentition is the very much larger size of pm 2 in 

 E. orientalis and the nearly transverse position of m3. The 

 palatal vacuities are much broader in E. orientalis, and the 

 posterior border of the palate is developed into a broad shelf 

 behind the transverse ridge, thus differing very widely from 

 the same part in E. europosus, which extends but little beyond 

 the ridge and terminates in a central sharp spine, which is 

 absent in E. orientalis. The lower jaw has about the same 

 general form in the two species, except that the coronoid pro- 

 cess is much broader and higher in E. orientalis. The lower 

 dentition, however, is quite different in the two, through the 

 very small size of the incisors, canines, and premolars in E. 

 orientalis as compared with E. europ&us. 



There appear to be very few references to the occurrence 

 of any species of Erinaceus in southeastern Siberia, and in 

 these cases the species is referred to E. europczns. Von 

 Schrenck found it near Aigun, on the Amoor River, and 

 Radde refers to specimens collected by Maack and Maximo- 

 wicz on the Ussuri River, but both Schrenck and Radde con- 

 sidered their specimens specifically identical with E. europ&us. 



There being apparently no available name for the East 

 Siberian animal, I have conferred upon it the name orientalis, 

 in allusion to its extreme eastern distribution. Erxleben's 

 Erinaceus sibiricus (Syst. Reg. Anim., 1777, p. 172) was 

 based on Seba's figures and brief description of his "Erina- 

 ceus Sibiricus" (Thes. I, p. 79, pi. 49, figs. 4 and 5). Seba's 

 figures are unidentifiable, and the only hint as to the locality 

 of his specimen is the name, which he renders in French as 

 "Herisson de Siberie." The diagnosis, "Coloris est obscure 

 russi; . . ."; or, " II est d'un roux fonce, . . ."obvi- 

 ously does not apply to the pale East Siberian species. The 

 only other name to be considered is amurensis Radde, used 

 in his description of Plate V (Reisen im Siiden von Ost- 

 Siberien, I, 1862, p. 325), where he says: "Fig. i. Erinaceus 

 europcsus L. (amurensis) a. c. d." But nowhere in the text 

 does he state the locality of the specimen figured, and through- 

 out his text and tables of measurements mentions only skulls 

 from Dauria, Sarepta, and St. Petersburg. In any case his 



