153 mb. g. jl. boule>geb on [June 4, 



Type. 

 Atelodus, Pomel, Ann. Sci. Auvergne, xxvi. 



p. 114 (1S53) D. bicornis. 



Ehinastcr, Gerrard, Cat. Bones Mamin. B. M. 



p. 282 (1862) D. bicornis. 



Keitloa, Gray, t. c. p. 1025 D. bicornis. 



Ceratotherium, id. t. c. p. 1027 = D. simus. 



Two-horned. Occipital plane slanted backward. Auditory 

 region as in Dicerorhinus. Incisors and canines rudimentary or 

 absent. 



1. D. bicornis Linn. 



2. D. simus Burch. 



Should 1). simus, on the ground of its much longer skull and 

 the different structure of its molars, be separated generic-ally 

 or subgenerically from D. bicornis, it and its fossil allies would 

 have to bear the name of Ccelodonta, Bronn. 



These conclusions are practically identical with those to which 

 Sir "W. Flower came in his classical paper on the craniology of the 

 group (P. Z. S. 1876, p. 443), but unfortunately his study of 

 the nomenclature did not carry him back to the names now shown 

 to have priority. 



2. On a small Collection of Fishes from Lake Victoria 

 made by order of Sir H. H. Johnston, K.C.B. By 

 G. A. Boulenger, F.R.S. 



[Received May 21, 1901.] 



The Fishes which have reached the Natural History Museum 

 from the Victoria Nyanza through Sir H. H. Johnston are 

 referable to seven species only, four of which were previously un- 

 represented in the National Collection, two being besides new 

 to science. 



1. Pbotopterus .ethiopious Heck. 



Three specimens, two adult measuring 1 m. 35 and 1 m. 10, and 

 a young one measuring 160 millim. The latter was taken from 

 the crop of a Balasniceps. 



In the adult specimens the length of the head is contained 4| 

 times in the length from snout to vent, the diameter of the eye 

 is 15 or 20 times in the length of the head and 4g or 5| times in 

 the interocular width ; dorsal fin originating nearer the vent than 

 the head ; pectoral fin twice length of head, ventral fin 1-| ; vent 

 sinistral ; 65 scales in a longitudinal series to above vent, 44 or 50 

 round middle of body ; no traces of external gills. The scales 

 show very distinctly the punctulations of gamine already noticed 

 by Kolliker. 



