1. CLARIAS. 17 



fin reaches beyond the vertical from the origin of the dorsal, and the 

 length of its spine is four-fifths of that of the fin. 



Senegal. 

 a. Ten and a half inches long. West Africa. Purchased of Mr. Dalton. 



8. Clarias macromystax. 

 D. 78. A. 59. P. 1/9. 



Vomerine teeth finely granular, forming a band, which is not quite 

 twice as broad as that of the intermaxillaries, and which is not pro- 

 duced laterally into posterior processes. The lower jaw with a very 

 broad band of teeth. Head finely granulated, its length being two- 

 ninths of the total. Barbels long : those of the nostrils are as long 

 as the head, and those of the maxillaries extend to the twelfth dorsal 

 ray. The pectoral fin reaches a little beyond the origin of the dorsal, 

 and the length of the spine is four-fifths of that of the fin. 



Gambia. 

 a. Fine specimen. Purchased of Mr. Dalton. 



9. Clarias syriacus. 

 Cuv. $ Val. xv. p. 375. 



D. 60. A. 52. P. 1/10. 



The band of vomerine teeth is produced behind into a median pro- 

 cess. Head coarsely granulated, its length being two-sevenths of the 

 total. Barbels rather long. ( Val.) 



Syria. 



** The occipital process is not very prominent, and rounded behind. 



10. Clarias magur. 



??Silurus batrachus, L. Sust. Nat. i. p. 502. 



FSilurus batrachus, Bl. taf. 370. fig. If; Bl. Schn. p. 386. 



?Marpoo, Russell, Fish. Corom. ii. p. 53. pi. 168. 



? Macropteronotus batrachus, Lacep. v. pp. 84, 85. 



Macropteronotus magur, Ham. Buch. pp. 146, 374. pi. 26. fig. 45. 



Clarias marpus, Cuv. & Val. xv. p. 378. 



magur, Cuv. § Val. xv. p. 381 ; Bleek. Verh.Bat. Gen. xxv., Nalez. 



Ichth. Beng. p. 124. 

 punctatus, Cuv. # Val.juv. p. 384; Bleek. Verh. Bat. Gen. xxi., 



Sil. Batav. p. 53 ; Cant. Mai. Fish. p. 263. 

 ? Clarias batrachus, Cuv. 8f Vol. xv. p. 385. 

 Clarias batrachus, Bleek. Prodr. Silur. p. 343, and Atl. Ichth. Silur. 



p. 103. tab. 98. fig. 2. 



D. 64-70. A. 50-53. P. 1/8. 

 Caudal fin free. Vomerine teeth villiform, forming a crescentic 

 band, which is as broad as, or narrower than, that of the intermaxil- 

 lary. Head finely granulated above, its length (to the end of tho 

 occipital process) being somewhat more than one-fourth of the total 



t Bloch represents a Clarias with very long barbels, those of the maxillary 

 extending to the ventral fins : if this be really the case, the fish represented by 

 Bloch would belong to a distiuct species. 



VOL. V. 



