390 Mr. G. A. Boulenger on 



" nearly wliite " in colour ; whether it is blind or not I 

 cannot say for certain, but I can find no undoubted indications 

 of eyes in the specimen before me. 



EXPLANATION OF PLATE XL 



Phreatogammai^s propinquns, sp. n. 



Fig. 1. First antenna, X 60. 



Fig. 2. Second antenna, X 60. 



Fig. 3. First gnathopod, x 105. 



Fig. 4. Second gnathopod, x 105. 



Fig. 5. Fourth peraeopod, x 60. 



Fig. 6. End of pleon with uropoda, X 60. 



XLV. — On Barbus aureus, Cope, from Natal. 

 By G. A. BouLENGEE, F.R.S. 



A FISH obtained by Dr. Alden Grout at Uravoti, near the 

 boundary between Natal and Zululand, was described by the 

 late Prof. E. D. Cope in 1869 (Tr. Amer. Philos. Soc. (2) 

 xiii. p. 406) under the name of Laheoharhus aureus. The 

 original description was so meagre as to make it impossible 

 to assign the species its position in the system. Having 

 recently had to describe several new Barbels from the eastern 

 parts of South Africa, I felt extremely anxious to know 

 something more of this Laheoharhus aureus, the types of 

 which are preserved in the Museum of the Academy of 

 Natural Sciences, Philadelphia. In answer to an application 

 made through my friend Dr. A. Erwin Brown, I have been 

 favoured by the Curator of the Museum with the loan of one 

 of the types, from which I have drawn up the following 

 definition. The other specimen, which I have not seen, has 

 been compared by Mr. W. H. Fowler, who states that he can 

 detect no difference of any importance between the two. 



The fish is not referable to the group named Laheoharhus 

 by EUppell. It has the thin lips and the trenchant lower jaw 

 which characterize the genus Capoefa as defined by Giinther; 

 but its affinities are with L. Bowkeri, Blgr., from Natal, 

 which has the edge of the lower jaw rounded and the lower 

 lip continuous across the chin. It affords a further instance 

 of the unsatisfactory arrangement of the species of this genus 

 according to the structure of the mouth and lips, to which I 

 have alluded on previous occasions when describing species 

 from Morocco, Abyssinia, East Africa, and the Transvaal, 



