19. BARBUS. 101 



a little more than the length of the head, which is one-fourth of the 

 total (without caudal). Snout of moderate length and somewhat 

 wedge-shajied ; lips thin, the lower with the transverse fold con- 

 tinuous; mouth inferior. Eyes of moderate size. The origin of 

 the dorsal fin is a little nearer to the root of the caudal than to the 

 end of the snout. Caudal fin forked. Anal very high and narrow, 

 extending to the root of the caudal. 

 Interior of Southern Africa. 



a. Type of the species, 15 inches long : stuffed. Presented by Sir 

 A. Smith. 



37. Barbus welwitschii. 

 D. 10. A. 8. L. lat. 35-36. L. transv. 6^6. 



The osseous dorsal ray is rather strong, very conspicuously ser- 

 rated, its stiff portion being two -thirds as long as the head ; there 

 are only seven other rays behind the osseous ray. Three longi- 

 tudinal series of scales between the lateral line and the root of the 

 ventral. Body oblong, its height being contained thrice and three- 

 fourths in the total length (without caudal), the length of the 

 head four times ; the depth of the head is less than its length, vnthout 

 snout. The diameter of the eye is less than the width of the inter- 

 orbital space (which is convex), rather more than one-fourth of the 

 length of the head, and equal to that of the snout, which is mode- 

 rately obtuse. Mouth inferior, small ; the lower barbel is consi- 

 derably longer than the upper, but scarcely as long as the eye. The 

 dorsal Jin is considerably lower than the hody, and commences behind 

 the origin of the ventral, its first ray being equidistant from the end 

 of the snout and the root of the caudal. Anal fin small, caudal 

 deeply forked. The pectoral does not quite extend to the ventral. 

 Back brownish, sides silvery, minutely punctulated with brown. 

 An indistinct narrow bluish band runs along the caudal portion of 

 the lateral line. 



Angola. 



a-c. Three and a half inches long. Fluilla. Presented by Dr. 

 Welwitsch. 



38. Barbus gibbosus. 



Peters, Monatsber. Ak. JFiss. Berl. 1852, .p. 683. 



D. 9. A. 8. L. lat. 36. L. transv. 6/4. 

 The osseous dorsal ray is rather strong and serrated ; there are 

 only seven other rays behind the osseous ray. Three and a half 

 longitudinal series of scales between the lateral line and the root of 

 the ventral. Body oblong, its height being contained thrice and 

 three-fourths in the total length (without caudal) ; tlic length of the 

 head is one-fourth of the same ; the depth of the head equals its length, 

 without snout. The diameter of the eye is one-fourth of the length of 

 the head, and about equal to that of the snout. Mouth rather small, 

 the lower barbel much longer than the upper, and slightly exceeding 

 the diameter of the eye. The height of the dorsal Jin is slightly (ess 



