1922] Allen, Congo Collection of Insectivora 13 



of, Atelerix, it thus determines under the peculiar conditions of the 

 case the genotype of the latter as E. pruneri. (Cf . 'Internat. Code Zool. 

 Nomen.,' Art. 30, II, /.) 



In Thomas's synopsis of the hedgehogs, the sole distinctive character 

 of Atelerix is : " Hallux absent; " and, so far as I can find, this is the only 

 distinction between Atelerix and his new genus ^Ethechinus, defined as: 

 "Coronal parting broad, conspicuous. Posterior palatal shelf broad. 

 Third incisor two-rooted." The last two characters, in comparison with 

 Erinaceus (as restricted by Thomas), are both present in Atelerix; 

 the first is of less importance, depending upon the stress to be laid upon 

 the words " broad, conspicuous," since in Atelerix there is a distinct 

 coronal parting, although less developed than in Erinaceus europseus 

 and its near allies. 



As shown below (p. 17), the absence of the hallux is not constant, 

 and therefore not an important character, since in different individuals 

 of the same litter of young it may be present or absent, although absent 

 as a rule in a number of forms of the pruneri {heterodactylus f)-adansoni 

 group, which is distributed over a wide geographical area. I agree with 

 Thomas that both Atelerix and Mihechinus are separable from Erinaceus, 

 sensu stricto, but collectively rather than as two generic groups, for which 

 the rule of priority demands the earlier name, Atelerix. 

 The forms referred to Atelerix by Thomas are : 



= Erinaceus albiventris Wagner, 1841. 



=E. adansoni Rochebrune, 1882. 



=E. hindei Thomas, 1910. 



=E. spiculus Thomas and Wroughton, 1907. 



= Atelerix spinifex Thomas, March, 1918. 



=A. kilimanus Thomas, March, 1918. 



To which may be added: 



7. hindei sotikse=E. sotikge Heller, 1910. 



8. faradjius = A. faradjius (described below). 



9. langi =A. langi (described below). 

 And pruneri = Erinaceus pruneri Wagner, 1841 (=?E. heterodactylus 



Sundevall, 1841), in place of "albiventris" as No. 1 of the above list, 

 and also as type of Atelerix in place of albiventris. 



Atelerix faradjius, new species 



Type, No. 51006, 9 ad., Faradje, northeastern Belgian Congo, July 7, 1911; 

 Herbert Lang and James P. Chapin. American Museum Congo Expedition. Orig. 

 No. 1660. Topotype ( 9 very old), No. 51007. 



Represented by two adult females from Faradje, of the so-called u albiventris" 

 type. 



1. 



albiventris 



2. 



adansoni 



3. 



hindei 



4. 



spiculus 



5. 



spinifex 



6. 



kilimanus 



