Dr. C. W. Andrews — Fauna of Wadi-Natrun, Egypt. 437 



few accessory cusps and a short talon; the front of the tooth is 

 incomplete, the antero-internal cusp having been broken away; the 

 antero-external cusp is oval in outline. Behind the anterior pair 

 of main cusps and closely adherent to the inner one is a small 

 tubercle (the hinder tubercle of the anterior crescent), and immediately 

 behind this a rather larger tubercle occupying the middle of the 

 transverse valley (this is the ' central-hiigel ' of Stehlin and 

 the tubercle marked 'e' by Lydekker). Of the hinder pair of 

 main cusps the inner is the smaller and the higher ; behind them, 

 again, is a large median cusp (the ' verbindungs-hiigel ' of Stehlin,^ 

 'a' of Lydekker's^ figures). The talon is short and simple, 

 consisting of a main cusp ('b' of Lydekker) nearly in the middle 

 line, a smaller one (' c ' of Lydekker) internal to this, and smaller 

 tubercles opposite the outer ends of the ' verbindungs-hiigel ' : 

 these last small cusps seem to belong to the cingulum, which is 

 not otherwise represented. 



The most notable character of this tooth is its very small size. 

 Its length at the base of the crown is 24 mm., at the summit of the 

 crown 22 mm. ; its greatest width was approximately 13 mm. It 

 is therefore longer than the corresponding tooth of Siis punj'abiensis 

 (16 mm.), and at the same time considerably smaller than some 

 specimens in the British Museum referred to Sus hysudricus, which 

 in many respects it resembles closely. As Stehlin has pointed out, 

 however, it is very doubtful whether all the specimens referred to 

 S. hysudricus really belong to one species ; it is the Potamochoerus- 

 like form figured by Lydekker (op. cit. supra, pi. viii, figs. 2 and 3) 

 which comes nearest to our Egyptian species. With such scanty 

 material as is available at present it is impossible to determine 

 definitely the systematic position of this animal, but it seems most 

 likely that it comes somewhere between the earlier Palaochoerus 

 and the later Sus hysudricus, or perhaps Potamochmrus. The dwarf 

 forms Suspunjabiensis, Sanitherium Schlagintweiti, and Porcida salviana, 

 which seem to be closely allied to one another, may also be related, 

 but are still smaller. 



Eemains of Euminants are represented by the teeth, horn-cores, 

 and fragments of limb bones of various antelopes. 



Hippotragus ? Cordieri, De Christol. (PI. XXI, Figs. 7 and 8.) 



The most interesting of these specimens is an unworn left third 

 lower molar. After comparison with the teeth of many antelopes 

 it was found that this tooth agrees almost exactly in pattern with an 

 uncut third lower molar of a young individual of Hippotragus niger, 

 but that at the same time the crown is much more brachydont. 

 Thus, in the recent species the length of the tooth to the height of 

 the crown is as 29 to 43, in the fossil the proportion is as 31 to 36. 



1 Stehlin, " Ueber die Geschichte des Suiden-Gebisses " : Abband. Scbweiz. 

 Palaeont. Gesellscbaft, vol. xxTi (1899), p. 30. 



2 Lydekker, ," SiwaUk and Narbada Bunodont Suiaa," pi. viii, etc. : Palaeont. 

 Indica, vol. iii (1884). 



