570 



Mr. C. T. Reoran on the 



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

 supraoccipital and the pterotic, the lower limb is expanded 

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

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

 posterior ramus of the pardpophysis 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 

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

 air-bladder. 



F\s. .3. 



A. 



B. 



Diajirams showino; the cranial roof-bones of A. rseudauchenijiierus 

 nodosus and B. Euchilichthys royauxi. 



eth, mesethmoid ; leth, lateral ethmoid ; /. frontal ; soc, supraoccipital ; 

 spo, sphenotic ; pto, pterotic ; epo, epiotic ; scl, supra-cleithruui ; 

 1, 2, 3, nuchal plates. 



These African fresh-water fishes resemble the Bairridiv 

 except in the characters of specialization enumerated 

 above. 



The genera may be arranged thus : — 



I. Mandibulnrv barbels branched ; niaxillaries at the sides of the 

 prsemaxillaries ; parapophyses of sixth vertebra normal. 



oynodotitis, Mioosynodvntis^ Mochncus, 



