SJOSTBDTS KILIMANDJARO-MERU EXPEDITION. , r ). 



Biirlnis perdvali BOULENGER. 

 I tin-bus Percivali, BOULENGER Ann. & Mag. Nat. Hist., (7), vol. XI 1903 p. 52. 



6 specimens from the river Sanya, Kibonoto, 28 /? 1905. 



BOULENGER has described this species from the Nairobo River, Kilimandjaro 

 0,500 feet". 1 The five smaller specimens of this collection agree entirely with the ori- 

 ginal description. The sixth which is a little larger than BOULENGER'S types, and mea- 

 sures 89 mm. has a little different proportions. The description of the species may thus 

 be somewhat widened with the following addition: Depth of body equal to length of 

 head 3V-- to 4 times in total length. Posterior barbel I'/a to nearly 2 diameters of eye. 



Professor SJOSTEDT has communicated about the habitat of this fish the following- 

 notes: The specimens were caught in a small tributary to the river Sanya. In the 

 clear and cold water of this shallow river, which was slowly running over stony ground, 

 this fish lived in small schools swimming near the bottom and looking like roaches. The 

 river runs from the mountain towards the steppe and is surrounded by woods. 



liarhiis jiirksoni GUNTHER. 

 Ijiirbu* ,/(u-kxoni GUNTHER Proc. Zool. Soc. 188!) p. 72. 



3 specimens from Mombo River, June 1906. Caught with hook and line with flies 

 used for bait, D. Ill, 7. A. Ill, 5. L. lat. 37. 



Depth of body about SVa times in total length without caudal. Length of head 

 4 to 4Vo times in total length without caudal. Snout a little shorter than eye which is 

 contained about SYa times in length of head. Interorbital width about 2 1 _ times in 

 length of head. Anterior barbel a little shorter than eye, posterior about l',n times 

 as long as eye. Third simple dorsal ray strongly ossified, not serrated, longer than 

 head, second not much more than Vs of the length of the third. Origin of dorsal behind 

 base of ventrals. Free edge of dorsal emarginate. Longest anal ray about "la of length 

 of head or a little more. Pectoral not reaching ventral. Depth of caudal peduncle 

 contained from I 3 n to nearly 2 times in its length Q 1 /* scales from lateral line to origin 

 of dorsal and 3 Va scales to base of ventral. 



Silvery, olive above, 3 dark spots on the side, the first above the 7:th, the second 

 above the 15:th or 16:th scale, and the third at the base of the caudal. 



Largest specimen 116 mm. 



This fish agrees with B. jackxotii according to the original description 2 except that 

 GUNTIIER says the origin of the dorsal fin is opposite to the root of the ventral . If 

 this is to be taken literally, the fish from Mombo differs in having the origin of the dor- 

 sal behind the vertical through the base of the ventrals. The posterior barbel is also 

 longer in the fish from Mombo, but I do not think that these small differences are of 

 specific value. This fish was common in Mombo river. 



Ann. Ma.u'. Nat. HJNt. (7) XI. llio:;. 

 - Proc. Xool. Soc. l**!i. 



