AUCHENOGLANIS. 3G7 



Vertebrae 43-48 (18-21 + 25-27). 9 branchiostegal rays. Intestinal 

 canal much elongate and forming numerous convolutions. 

 Nile and Tropical Africa. 



Synopsis of the Species. 



I, Occipital process and interneural plate large, granulate like the head. 

 Snout £ or slightly more than \ length of head ; 



maxillary barbel more than ^ length of head, 



reaching beyond posterior border of eye, not [p. 367. 



much shorter than outer mandibular . . . 1. A. biscutatus, I. Geoffr., 

 Snout usually more than i length of head ; max- 

 illary barbel | to a little over ^ length of 



head, not extending beyond eye, usually [p. 309. 



shorter than outer mandibular 2. A. occidentalis, C. & V., 



II. Occipital process and interneural plate narrow, often indistinct under the 



skin. 



A. Occipital process in contact with interneural plate; maxillary barbel not 



more than ^ length of head. 

 Longest dorsal rays \ length of head .... 3. A. ngamensis, Blgr., p. 371. 

 Longest dorsal rays a little longer than head . . 4. A. altipinnis, Blgr., p. 372. 



B. Occipital process not in contact with interneural plate. 

 Maxillary barbel \ to | length of head, more than 



i as long as outer mandibular ; eye 7-10 



times in length of head 5. A. ballayi, Sauv., p. 373. 



Maxillary barbel \ length of head, not i as long 



as outer mandibular ; eye 6 times in length 



of head 6. A. ubangensis, Blgr., p. 375. 



Maxillary barbel as long as head, a little shorter 



than outer mandibular ; eye 6 times in length 



of head 7. A. punctatus, Blgr., p. 370. 



1. AUCHENOGLANIS BISCUTATUS. 



Pimelodus biscutatus,!. Geoffr. Descr. Egypte, Poiss. p. 301, pi. xiv. tig. 1 (1827); 



Cuv. & Val. Hist. Poiss. xv. p. 197 (1840). 

 Douq Majeq, Rifaud, Voy. Egypte, pi. cxciii. no. 35 (1830). 

 Auchenaspis biscutatus, Bleek. Nederl. Tijdschr. Dierk. i. 18G3, p. 101. 

 Auchenaspis biscutatus, part., Giinth. Cat. Fish. v. p. 137 (1864), and Petherick's 



Trav. ii. p. 232 (1869). 

 Auchenoglanis biscutatus, part., Bouleng. Poiss. Bass. Congo, p. 296 (1901). 

 Auchenoglanis biscutatus, Bouleng. Ann. & Mag. N. H. (7) x. 1902, p. 263, and 



Pish. Nile, p. 344, pi. lxii. (1907). 



Depth of body 3| to 5 times in total length, length of head 2f to 3j 



