364 SILUEID.E. 



22. PARATJCHENOGLANIS, g. n. 



Body moderately elongate, feebly compressed. Dorsal and anal fins 

 short, the former composed of a spine and 7 branched rays, and 

 followed by a long adipose fin. Pectoral fin with a spine. Ventral 

 fin with 6 rays, inserted below the dorsal fin. Three pairs of 

 barbels : maxillary and two mandibulars. Nostrils widely separated 

 from each other, the anterior tubular, on the upper lip, the posterior 

 slit-like. Eye superior, without free border. Maxillary bone rather 

 large, hidden in the lip but bordering the mouth ; jaws with a large 

 band of villiform teeth. Gill-membranes free, deeply notched. Air- 

 bladder large, free. 



Vertebra? 39 (16 + 23). 10 branchiostegal rays. 



Cameroon, Gaboon. 



Two species : — 



Outer mandibular barbel not reaching beyond 



middle of pectoral fin 1. P. guttatus, Lonnb., p. 364. 



Outer mandibular barbel reaching extremity 



of pectoral fin 2. P- macrostoma, Pollegr., p. 3G5. 



1. PARATJCHENOGLANIS GUTTATCS. 



Pimelodus guttatus, Lonnb. Olivers. Vet.-Akad. Forh. Stockholm, 1895, no. 3, 



p. 184. 

 Auchenoglards guttatus, Bouleng. Ann. Mus. Congo, Zool. ii. p. 40 (1902). 



Depth of body 5 to 6 times in total length, length of head 3^ to 3| 

 times. Head much depressed, 1^- to 1^ times as long as broad, its 

 upper surface smooth ; snout broadly rounded, -§- length of head ; 

 occipital process small, longer than broad, not reaching the feebly 

 developed interneural plate; eye superior, 7 to 10 times in length of 

 head, 2\ to 3 times in interorbital width ; mouth broad, terminal ; 

 prsemaxillary teeth forming a long and broad crescentic band. Maxillary 

 barbel f to f length of head, inner mandibular § to §, outer mandibular 

 nearly as long as head or a little longer, reaching base or middle of 

 pectoral fin. Gill-rakers rather long and widely set, 10 or 11 on lower 

 part of anterior arch. Humeral process small, pointed, smooth. Dorsal 

 I 7 ; spines smooth, f to ^ length of head. Adipose dorsal 4 to 6 times 

 as long as deep, 2 to 3 times as long as its distance from rayed dorsal. 

 Anal 11-12 (7-8 rays branched). Pectoral not reaching ventral ; spine 



