Vol. 5, p. 189-190, pi. 11. Decembeb 18, 1925. 



Occasional Papers 



OF THE 



Boston Society of Natural History. 



A NEW SILUROID FISH OF THE GENUS CLARIAS FROM 

 SOUTHWESTERN UGANDA. 



BY J. R. NORMAN. 



The collection of fishes made by Dr. John C. Phillips in 1924 

 includes an example of Barbus fergussonii Boulenger and four 

 examples of Barbus altianalis Boulenger from Lake Edward. 

 The latter proves to be identical with B. radcliffii Boulenger from 

 Lake Victoria. There are also five examples of a new species of 

 Clarias which is described below. 



Clarias phillipsi, sp. nov. 

 Plate 11. 



Type. — No. 31519, Museum of Comparative Zoology, from Lake Chahafi; 

 230 mm. in total length. 



Description. — Depth of body 5 1 / 3 to 7 1 / 2 in the length, length of head4V3 

 to 4 3 / 4 . Head about l 1 / 3 times as long as broad, smooth; occipital process 

 broader than long, pointed; frontal fontanelle more than twice as long as 

 broad; occipital fontanelle smaller; eye very small, 4 to 5 times in length of 

 snout, 6 3 A to 8V2 in interorbital width, which is a little less than 1 / 2 length of 

 head; band of premaxillary teeth 3 1 / 2 to 3 3 A times as long as broad; vomerine 

 teeth granular, forming a curved band which is nearly as broad as the pre- 

 maxillary band; nasal barbel 3 /sto nearly 2 / 3 length of head; maxillary barbel 

 about as long as head without occipital process, reaching well beyond gill- 

 opening; outer mandibular barbel l 1 / 3 to IV2 times length of inner, which is 

 more than 1 / 2 length of head. Gill-rakers few, 8 to 11 on anterior arch. 

 Clavicles hidden under the skin. Dorsal 74 to 78; its distance from occipital 

 process l 2 / 3 to P/4 in length of head. Anal 55 to 58. Dorsal and anal sepa- 

 rated from caudal by a space which is equal to or a little greater than diameter 

 of eye. Pectoral about 2 2 / 6 to 2 2 / 3 in length of head, the spine short, serrated 

 on outer side. Pelvics l 2 /6 to l 1 / 2 times as far from caudal as from end of 

 snout. Caudal about V2 length of head. Grayish, lighter below. 



Remarks. — Five specimens, 180 to 230 mm. in total length, 



