45^ Bulletin American Museum of Natural History. [Vol. XIX, 



vSahel Alma. 



Acrogaster heckeli. 



" davisi. 



Pycnosterinx russeg- 



geri. 

 Pycnosterinx discoides. 

 gracilis. 



" dubius. 



" elongatus. 



" latus. 



Hoplopteryx syriacus. 



" stachei. 



" oblongus. 



Dinopteryx spinosus. 



Orosoma sahel-almae. 

 " intermedium. 

 " pulchellum. 



Hakel. 



AnCtUILLAVID.'E. 



Anguillavus bath- 

 sheb^e. 



Encheliid^. 



Enchelion montium. 



Berycid^. 



Hoplopteryx lewisi. 



Stro.mateid.^. 



CaRANGID-'E. 



Aipichtys velifer. 

 " minor. 



Haiula. 



Anguillavus quadri- 



pinnis. 

 Anguillavus bath- 



shebae. 



Pycnosterinx levi- 

 spinosus. 



Hoplopteryx lewisi. 



Aipichtys formosus. 

 " minor. 



An examination of the lists given above shows that the 

 beds at Sahel Alma contain an assemblage of species which is 

 quite different from that found at either of the other localities ; 

 furthermore, that the fauna of Hajula closely resembles that 

 of Hakel. From Sahel Alma there have been collected 62 

 species; from Hakel, 50 species; and from Hajula, 34 species. 

 Of those obtained at Sahel Alma it is not certain that a single 

 species has been collected at either of the other localities. 

 It is possible that Holcolepis atteniiatus, of Sahel Alma, oc- 

 curs also at Hakel, and that Enchodus longidens is common 

 to all three localities; but this is not yet proved. On the 

 other hand, out of the 34 species found at Hajula, 20 are 



