The Freshwater Fixltes of South Africa. 557 



with a thin skin and feeblv rugose ; frontal fontinelle large, 4 times 

 as long as broad, nearly f length of head, sole-shaped ; occipital fon- 

 tiuelle small ; occipital process angular, broader than long ; snout 

 bn>ad, truncate, not projecting beyond mouth ; eye small, 3| times in 

 length of snout, 5 times in interorbital width ; nasal barbel a little 

 more than ^ length of head ; maxillary barbel -^ length of head, 

 reaching to posterior third of pectoral ; outer mandibular barbels 1-f- 

 times as long as inner, f length of head. Gill-rakers long, slender, 

 closely set, and very numerous. 



Dorsal 58, its distance from occipital process i length of head, 

 posterior margin rounded ; adipose dorsal minute, very low, short, 

 and in contact with caudal. Pectoral -!?- length of head ; spine strong, 

 serrated, f length of soft rays. Ventral a little nearer to snout than 

 to base of caudal. Anal 53, separated from caudal by a space equal 

 to diameter of eye. Caudal rounded. 



Colour (of preserved specimen) dark olive-brown, marbled with 

 whitish markings above, white beneath ; or more or less distinct dark 

 streak on lower surface of head. 



One specimen, 220 mm. in length, from Shesheke. Southern 

 Rhodesia (Rev. L. Jalla). 



Page 454 After GepJiyroglanis sclateri, Blgr., insert : 



AMPHILIUS. 



Pimelodus, part., Grtinth., Cat. Fish., v, p. 114 (1864). 



Amphilius, Griintb., t.c., p. 115 ; Poche, Zool. Anz., 1902, pp. 121 

 and 212 ; Bouleng., Freshw. Fish. Africa, ii, p. 353 (1911), and iv, p. 

 306 (1916). 



Anoplopterus, Pfeff., Jahrb. Hamb. Wiss. Aiist., vi, 2, 1889, p. 15. 

 and Thienv. O.-Afr., Fische, p. 33 (1896) ; Bouleng., Ann. and Mag. 

 Nat. Hist, (7), i, 1898, p. 255, and Ann. Mus. Congo, Zool., ii, p. 41 

 (1902). 



Chimarrhoylanis, Vaill., Bull. Mus. Paris, 1897, p. 81. 



" Body more or less elongate, more or less depressed anteriorly. 

 Dorsal and anal fins short, the former consisting of a soft simple ray 

 and 5 to 7 branched rays ; an adipose dorsal fin. Pectoral fin 

 expanded horizontally, the outer ray more or less thickened but not 

 ossified, formed of very numerous angularly bent articles, bearing an 

 outer series or fringe of hair-like rays. Ventral fin with 6 rays, the 

 outer of which is similar to the outer pectoral. Three pairs of barbels ; 

 maxillary and two maudibulars. Nostrils widely separated from each 

 other. Eye superior, without free border. Maxillary bone rather 



