570 



Mr. C. T. Refran on the 



limb of the supra-cleitlirum is a plate united with the 

 supraoccipital and the pterotic, the lower limb is expanded 

 vertically. The vertebrae number 33 to 44 (11-17+19-27); 

 the fifth and six are rigidly united with the complex ; the 

 posterior ramus of the parapophysis of the fourth vertebra 

 is similar to the well-developed parapophysis of the fifth, its 

 anterior ramus is a transverse lamina, with an inferior 

 process expanded to form a thick vertical plate, free from 

 tlie supra-cleithrum, inserted in the anterior wall of the 

 air-bladder. 



A. 



B. 



Diagrams sliowino; tl)e crauial roof-bones of A. rseudanchentpterus 

 nodosus and B. Euchiiichfhys roi/auxi. 



eth, mesethmoid ; lefk, lateral ethmoid ; /. tVontal ; soc, supraoccipital ; 

 spv, spheiiotic ; pto, pterotic ; epo, epiotic ; scl, siipra-cleithruiu ; 

 1, 2, 3, nuchal plates. 



These African fresh-water fishes resemble the Bagridre 

 except in the characters of specialization enumerated 

 above. 



The genera may be arranged thus : — 



I. Mandibulary barbels branched ; maxillaries at the sides of the 

 prferaaxillaries ; parapophyses of sixth vertebra normal. 



Synodontis, Microsynodonfis, Mochacus. 



