194 Mr. O. Thomas on the 



Posterior palatal shelf narrow, Third in- 

 cisor normally one-rooted 1. Erinaceus. 



b*. Coronal parting broad, conspicuous. Poste- 

 rior palatal shelf broad. Third incisor 



two-rooted 2. JEthechttms. 



W. Hallux absent 3. Atclerix. 



b. No median parting on crown. Postj>lenoids as 



large as mastoids, hollowed internally * 4. Tfemiechinus. 



B. Pterygoids inflated, their cavity communicating 

 with that of tbe bulla? ; parapterygoid fossa? 

 shallow t. Postglenoids even larger and more 

 hollowed out than in Hemiechinus, A parting on 

 crown 5. Paraechimis. 



1. Erinaceus. 



Erinaceus, Linn. Syst. Nat. (10) i. p. 52 (1758). 



Range. Palsearctic Region, from Spain to China. 

 Genotype. E. europceus, Linn. 

 Other species and subspecies : — 



chhiensis, Sat. 

 concolor, Mart. 

 consolei, B.-Ham. 

 dealbatus, Swinh. 

 hanensis, Matsch. 

 hispanicus, B.-Ham. 



italicus, B.-Ham. 

 kreyenbergi, Matsch. 

 ?iesiotes, Bate. 

 roumanicus, B.-Ham. 

 tachifuensis, Matsch. 

 ussuriensis, Sat. 



2. jEthechinus, gen. nov. 



Range. Africa from Algeria to the Cape ; also just pene- 

 trating into Southern Europe (Spain and Balearic Islands). 

 Genotype. JE. algirus (Erinaceus algirus, Duv. & Lereb.). 

 Other species and subspecies : — 



frontalis, Smith. vagans, Thos. 



sclateri, And. | 



Besides the characters mentioned in the synopsis above, 

 this new genus differs from Erinaceus in the structure of the 

 sole-pads and other details, which have been described by 

 various authors when distinguishing algirus from europwus — 

 notably by Miller, in his ' Mammals of Western Europe,' 

 1912. It is evidently a natural group, as the distribution 

 shows, and clearly deserves a special name. 



* As in J. A. S. B. xlvii. pi. iv. 



t As in P. Z. S. 1895, p. 416, fig. 2, and J. A. S. B. xlvii. pi. iii. 



