It) SILURID.K. 



5. Clarias lazera. 



Cuv. 4- VaJ- XV. p. 372 ; IlyHl, Denkschr. Acad. Wiss. Wlett, 1859, xvi. 

 p. 17. 

 D. 77. A. 58. P. 1/10. Vert. 20/41 (C. 6f V.) ; 17/45 {Hyrtl). 



Vomerine teeth granular, forining a band, which in its middle is 

 broader than that of the intermaxillaries ; it has not a process behind 

 in the middle of its concavity. Head coarsely granulated above, its 

 length being one-fourth of the total. Barbels long : those of the 

 nosti'il extend nearly to the root of the pectoral, those of the maxil- 

 lary beyond the origin of the dorsal. The pectoral fin extends to, or 

 somewhat beyond, the vertical from the origin of the dorsal ; its spine 

 is short, not quite two-thirds as long as the fin. The dorsal extends 

 to the root of the caudal. 



NUe. 



rt, b, c-e. Adult, half-grown, and young. Upper Nile. From Consul 



Petherick's Collection. 

 f-h. Young. Gondokoro. From Consul Petherick's Collection. 

 i. Dried. Nile. Presented by G. MacLeay, Esq. 



H. Clarias macracanthus. 

 D. 70-75. A. 54-55. P. 1/9. Vert. 19/4-3. 



Vomerine teeth granular, forming a band, which in its middle is 

 twice as broad as that of the intermaxillaries, and in the middle of 

 its posterior margin has a very short inconspicuous process. Head 

 coarsely granulated above, its length being a little more than one- 

 fourth of the total. Barbels of moderate length, those of the nostril 

 being two-fifths as long as, and those of the maxillary extending to 

 the end of, the head. The pectoral fin reaches to the vertical from 

 the origin of the dorsal ; the length of its .spine is three-quarters, or 

 rather more than two-thirds, of that of the fin. 



Nile. 



o, h-c. Sixteen inches long. -Upper Nile. From Consul Petherick's 



Collection. 

 d. Adult. From the Collection of the Zoological Society. 

 «. Adult : skeleton. From Dr. E. RiippeH's Collection as CI. hassel- 



qnistii. 



7. Clarias xenodon. 



D. 68. A. 54. P. 1/9. 



Vomerine teeth granular, forming a crescentic band, which in its 

 middle is twice as broad as that of the intermaxillaries, and in 

 the middle of its posterior margin has a very short and inconspi- 

 cuous process. The band of mandibidary teeth is as broad as that 

 on the vomer, and composed of villiform teeth anteriorly, and of gra- 

 nular posteriorly. Head coarsely granulated above, its length being 

 rather more than one-fourth of the total. Barbels of moderate length, 

 those of the nostrils being half as long as the head, and those of the 

 maxillarj- extending to the end of the pectoral spine. The pectoral 



