On a nev) Barbus from Cameroon. 



21)7 



Uab. Indian Sea, off Oman. 



The species may well be called, after its finder, Ejbrissus 

 Townsendt. 



The following measurements may be of some service : — 



Test. 



Length of Ambulacra. 



Length. 



Greatest 

 breadth. 



Height at 

 ar ex. 



Anterior. ' Ant. Iat. 



G4 

 54 

 38 



49 

 44 

 30 



32 



28 

 21 



22-5 

 15 



21-5 

 14 



Post. Iat. 



21-5 



14 



XXVf. — Descrip'ion of a new Barb a? from Cameroon 

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



The number of recently discovered African Barbels of the 

 group of Barbus Bynni is really surprising. Until a y ear 

 ago the group was unrepresented in West Africa • then' I 

 described a species, B. Batesii *, allied to the East- African 

 B. tanensis, Gthr., discovered in Cameroon by Mr. G. L. 

 Bates, whilst the description of a second closely allied species' 

 likewise from Cameroon, B. Linnelli, Lonnberg, appeared in 

 the last number of these 'Annals' f. .Thanks to the exer- 

 tions of Mr. Bates, I am now able to add a third Cameroon 

 species to the list. 



Barbus micronema. 

 Depth of body 3 times in total length, length of head 4 to 

 A\ times. Snout rounded-subtruncate, 2§ to 3 times in 

 length of head, projecting beyond the mouth, with small 

 pearl-like granules on the sides ; diameter of eye 41 to 5± 

 times in length of head, interorbital width twice to twice and 

 one third ; mouth inferior, forming a broken arch, a feebly 

 curved transverse line in front, its width 3 times in length of 

 head ; lips feebly developed, lower restricted to tha sides • 

 edge of lower jaw forming a blunt keel ; barbels one or two 

 on each side, the anterior, if present, quite minute, the poste- 

 rior \ diameter of eye. Dorsal II I 10, last simple rav strong- 

 bony, not serrated, its rigid part f to § length of head free 

 edge of the fin strongly emarginate ; its distance from the 

 occiput a little less than its distance from the caudal fin. 



* Proc. Zool. S,,r. 1903. i. p. 2>, pi. iii ti ■•• 2 

 t P. 138. 



