ArCHENOGLANlS. 3G7 



Vertebrge 43-48 (18-21 + 25-27). 9 biancliiostegal rays. Intestinal 

 canal much elongate and forming numerous convolutions. 

 Nile and Tropical Africa. 



Spiopsis of the Species. 



I. Occipital process and interneural plate large, granuhite like tbe head. 

 Snout ^ or slightly more than \ length o£ head ; 



maxillary barbel more than ^ length of head, 



reaching beyond posterior border of eye, not [p. 307. 



much shorter than outer mandibular . . . 1. ^4. hiscutatus, I. Geoftr., 

 Snout usually more than ^ length of head ; max- 

 illary barbel ^ to a little over ^ length of 



head, not extending beyond eye, usually [p. 3G0. 



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



II. Occipital process and interneural ])late 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 i length of head .... 3. A. n<jamens'is^^\gY., \). '^11. 

 Longest dorsal rays a little longer than brad . . 4, A. altipinn'is, Blgr., p. 37:^. 



B. Occi})ital process not in contact with interneural plate. 

 ]\Iaxillary barbel i to ij length of head, more than 



■^ as long as outer mandil)ular ; eye 7-10 



times in length of head .5. A. hallai/i, Sauv., p. 'M'.). 



Maxillary barbel ^ length of head, not i as long 



as outer mandibular ; eye (I times in length 



of head C>. A. iiha)iaeii.<L-<, Ij]'^r.,\). 37.). 



Maxillary barbel as long as head, a little shorter 



than outer mandibular ; eye G times ia length 



of head 7. ^1. ]>niicUitus, B!gr., p. 37l). 



1. AUCHENOGLANIS BISCUTATUS. 

 Pimelodus hisaUat UK, J. Geoftr. Descr. Egypte, Poiss. p. 301, pi. \\v. fig. 1 (l^>-7) ; 



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

 Douq Majeq, liifaud, Yoy. Egyple, pi. cxciii. no. 35 (18.30). 

 Aiichcnaspis hisciitattis, Bleek. Nederl. Tijdschr. Dierk. i. 1863, p. lOL 

 Aacheiiaspis biscntatus, part., Giinth. Cat. Fish. v. p. 137 (18G-1), and Petlierick's 



Trav. ii. p. 232 (lyOHj. 

 Ainlienoykmis Jdscutatits, part., Bouleng. Poiss. Bass. Congo, p. 200 (1901). 

 Auc/ie»o(jlanis hiscatatiis, Bouleng. Ann. & Mag. N. H. (7) x. ll)U2, p. 2(13, and 



Fish. Nile, p. 311, pi. Ixii. (I'J07). 



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



