146 ME. G. A. BOULENGBE ON A COLLECTION 



swelling or obtuse keel, these keels forming together very regular longitudinal lines. 

 Olive above, silvery white beneath. 



This handsome fish, which grows to a length of three feet, and the flesh of which is 

 much esteemed, was discovered almost simultaneously at Albertville by Capt. Hecq and 

 at Usambura by Mr. Moore. 



10. Barilius moorii. (Plate XIV. figs. 2, 2 a.) 

 Bouleng. Ann. & Mag. N. H. (7) vi. 1900, p. 480. 



Depth of body equal to length of head, 4 times in total length. Head a little over 

 twice as long as broad, with slightly curved upper profile ; snout pointed, not extending 

 beyond the lower jaw, as long as or a little longer than the diameter of the eye, which 

 is contained 4 to 4^^ times in the length of the head ; interorbital width a little greater 

 than the diameter of the eye ; mouth extending to below the anterior third or the 

 centre of the eye ; no barbels ; the naked space between the prseopercle and the 

 suborbitals less than half the width of the latter. Gill-rakers very short, almost 

 rudimentary, 8 on lower part of anterior arch. Dorsal III 9, originating at equal 

 distance from the anterior border of the eye and the root of the caudal ; its border is 

 not notched, and its depth equals about § the length of the head. Anal III 13-14, 

 originating under the middle of the dorsal ; its anterior rays a little longer than those 

 of the dorsal and much longer than the posterior rays, forming a rounded lobe. 

 Pectoral pointed, shorter than the head, not reaching the ventral, which extends to the 

 origin of the anal. Caudal forked. Caudal peduncle twice as long as deep. Scales 

 56-60 ^^^, 3 between the lateral line and the root of the ventral. Silvery, brownish 

 on the back ; more or less distinct dark vertical bars on the side of the body, about 10 

 in number ; dorsal blackish at the end. 



Total length 115 millim. 



Several specimens from the north end of Lake Tanganyika. 



11. Barilius tanganic^. (Plate XIV. figs. 3, 3 a.) 



Bouleng. Ann. & Mag. N. H. (7) vi. 1900, p. 480. 



Depth of body equal to length of head, 4 j times in total length. Head a little over 

 twice as long as broad, with straight declivous upper profile ; snout very pointed, not 

 extending below the lower jaw, once and a half the diameter of the eye, which is con- 

 tained 5f times in the length of the head ; interorbital width once and a half the 

 diameter of the eye ; mouth extending to below the posterior border of the eye ; no 

 barbels ; the naked space between the prseopercle and the suborbitals about J the width 

 of the latter. Gill-rakers short, 10 on lower part of anterior arch. Dorsal III 10, 

 originating at equal distance from the occiput and the root of the caudal, the posterior 

 third of its base above the anal ; its anterior rays are longest, measuring a little more 

 than half the length of the head. Anal HI 17, strongly notched, with rounded 



