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RUWENZOEI EXPEDITION REPORTS. 



15. PISCES, BATEACHIA, and REPTILIA. 



By G. A. BouLENGEK, F.B.S., V.P.Z.S. 



Received October 24, read November 17, 1908. 



[Plates YIII. & IX.*] 



PISCES. 



Only one species of Fish, the widely distributed Tilapia nilotica, L., was known 

 from Ruwenzori, where specimens were found, between 5000 and 6000 feet, by 

 Mr. G. F. Scott Elliot. The same fish was obtained to the S.E., at 3200 feet altitude, 

 by Mr. R. B. Woosnam, the leader of the present Expedition. Examples of two species 

 were obtained near Fort Portal, alt. 4600 feet, "viz Clarias carsonii Blgr. and Barhus 

 fortali Blgr., the latter being a new species which I have described and figured in the 

 ' Fishes of the Nile.' From Irumu, in the Congo Forest, alt. 3000 feet, we have 

 examples of five species: Alestes macrophthahnus Gthr., A. grandisquamis Blgr., 

 A. imheri Peters, Barbus holotoenia Blgr., and Barilius ubangensis Pellegr. A small 

 collection made in the Aruwimi River contains representatives of ten species : 

 Pellonula oMusirostris Blgr., Bryconoethiops microstoma Gthr., Petersius woosnami Blgr., 

 Micralestes acutidens Peters, Labeo piarvus Blgr., Barilius ubangensis Pellegr., 

 ChelcPthiops elongatus Blgr., Eutropius grenfelli Blgr., Synodontis greshoffi Schilth., 

 and Mastacembelus congicus Blgr. 



Pellonula obtusirostris and Petersius woosnami have been described and figured in 

 the first volume of the British Museum Catalogue of African Fresh-water Fishes. 



Family Clupeid^. 

 1. Pellonula obtusikostris Blgr. 



Bouleng. Cat. Afr. F. Fish. i. p. 158, fig. 126 (1909). 

 Depth of body equal to length of head, A\ to 4-g- times in total length. Snout 

 obtusely pointed, projecting very slightly beyond the lower jaw, not quite as long as 

 the eye, which is three times in the length of the head and slightly exceeds the inter- 

 orbital width ; adipose lid feebly developed ; maxillary extending to below the anterior 

 third of the eye ; no strongly enlarged teeth. Gill-rakers slender, shorter than the 

 branchial lamellae, about 15 on lower part of anterior arch. Dorsal fin with 13 rays, 

 originating slightly in advance of the ventrals and much nearer the end of the snout 

 * For explanation of the Plates, see pp. 250, 252. 



VOL. XIX. — PART III. No. 32. — December, 1909. 2 K 



