1889.] FROM KILIMA-NJARO. 71 



and one third of the total length, without caudal. Snout much 

 longer than the eye, the piseorbital being longer than, and as high 

 as, the orbit. The teeth in the upper jaw form a broad villiform 

 band, those of the outer series heing a little stronger then the others. 

 These stronger teeth, which are thirty-eight in number on each side, 

 have the crowu slightly compressed, some showing a distinct notch 

 and being brown at the tip, Interorbital space twice as broad as 

 the orbit, convex. Scales on the cheek rather small, in three series ; 

 scales cycloid, of moderate size; the lateral line is interrupted below 

 the end of the spinous dorsal. 



Dorsal spines gradually increasing in length ; the sixth ray is the 

 longest, reaching backwards to the root of the caudal ; pectoral and 

 ventral fins long, extending to, or nearly to, the anal. 



Coloration uniform dusky, but some of the scales on the back seem 

 to have had a reddish-browu spot at the base. 



2. The other species were obtained by F. J. Jackson, Esq., F.Z.S., 

 in the river Ruva, in the Arusha country. 



Synodontis punctulatus, sp. nov. (Plate VIII. fig. A.) 



D. 1/7. A. II. P. 1/8. V. 8. 



Allied to Syndontis serratus and Sijndontis guttatus. 



The gill-opening extends downwards to before the root of the 

 pectoral fin. Mandibular teeth shorter than the eye, about 2-1 in 

 number, no villiform teeth behind them. Maxillary barbels a little 

 longer than the head, not fringed ; mandibular barbels provided 

 with filaments, the outer ones shorter than the head. The length 

 of the head (from the snout to the gill-opening) is one fourth of the 

 total length (without caudal). Nuchal carapace not much arched, 

 longer than broad ; its posterior processes do not extend behind 

 the dorsal spine. Dorsal and pectoral spines subequal in length, 

 and somewhat shorter than the head ; both these spines are 

 slightly serrated in front. Humeral process twice as long as high, 

 pointed behind. The distance between the dorsal and adipose fins 

 is more than the length of the former, but shorter than the head. 

 Head, body, and adipose fin covered with very numerous and yerv 

 small brown dots. The dots become somewhat larger above the 

 anal fin, on the free portion of the tail, and on the caudal fin, but 

 none exceed the pupil in size. 



Two specimens, of which the larger measures 8 inches. 



Tylognathus montanus, sp. nov. (Plate VIII. fig. B.) 



D. 12. A. 8. L. lat. 37. L. transv. 5/6. 

 Snout very obtuse, rounded, with small tubercles, and with fleshv 

 continuous lips, covering an inner, sharp, horny, labial edge on the 

 upper as well as lower jaw. The mouth is crescent-shaped and at 

 the lower side of the snout. A slender barbel is hidden in a deep 

 recess at the corner of the mouth, and the upper lip is overhung by 



