AUCHENOGLANIS. 3G7 



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

 canal much elongate and forming numerous convolutions. 

 Nile and Tropical Africa. 



Synopsis of the Sjiecies. 



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

 Snout tt or slightly more than ^ length o£ 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. 369. 



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 i to £ length of head, more than 



7? 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 ^ as long- 

 as outer mandibular ; eye 6 times in length 

 of head (J. A. iilangensis,l}]gr.,]). 37,"». 



Maxillary barbel a* long as head, a little shorter 

 than outer mandibular ; eye 6 times in length 

 of head 7. .4. punctata*, Blgr., p. 376. 



1. AUCHENOGLANIS BISCUTATUS. 

 Pimelodus biscutatus, I. Geoffr, Descr. Egypte, Poiss. p. 301, pi. xiw fig. 1 (1627) j 



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

 Douq Majeq, Eifaud, Voy. Egyple, pi. cxciii. no. 35 (1830). 

 Avchenaspis biscutatus, Bleek. Nederl. Tijdschr. Dierk. i. 1863, p. 101. 

 Aucheuaspis 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 



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

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



