1902.] ICHTHYOLOGY OF THE COSGO. 269 



from the small interneural shield. Dorsal I 6, first ray longest, 

 slightly longer than the head ; second dorsal very small, originating 

 above last rays of anal, its posterior rays adnate to the back 

 through a transparent membrane. Anal II 7-8. Pectoral a 

 little longer than head, reaching, or not quite reaching base of 

 ventral ; latter a little shorter, reaching anal ; outer ray of 

 pectoral and ventral much thickened. Caudal with ci-escentic 

 notch. Caudal peduncle much depressed, |- to 5 total length. 

 23 or 24 dorsal and 18 or 19 ventral scales, of which 8 or 9 are 

 on the caudal peduncle, the last 5 united round the latter. 

 Yellowish bi-own above, speckled with darker and with four more 

 or less distinct broad dark cross-bands ; fins whitish, with brown 

 spots forming bars across the pectoi'als and ventrals. 



Total length 82 millim. 



Fovir specimens. 



The genus Phractura Blgr. was represented by three species : 

 P. hovei Perugia, from the Lower Congo, of which I have lately 

 examined three specimens belonging to the Brussels Museum ; 

 P. scaphirhynchura Yaill., known from two specimens from the 

 Alima, Upper Congo ; and P. ansorgii Blgr., recently described 

 in these ' Proceedings ' from a single example discovered by 

 Dr. Ansorge in Southern Nigeiia. The four species now known 

 may be distinguished by means of the following synopsis : — 



I. Occipital process not reaching interneural shield ; 



snout aboiit half length of head. 

 Head feebly rugose above ; posterior nostril nearly 



as distant from the eye as the anterior from 



the end of the snout ; diameter of eye 10 or 



11 times in length of head, 2^ or 3 times in 



interocular width ; maxillary barbel f length 



of head 1. P. 6o«et Perugia. 



Head smooth above ; posterior nostril nearly as 



distant from the eye as the anterior from the 



end of the snout ; diameter of eye 6 or 7 



times in length of head, twice in interocular 



width ; maxillary barbel \ length of head ... 2. P. lindica Blgr. 

 Head rugose above, with strong ridges ; posterior 



nostril very near the eye, the diameter of 



which is 7 times in length of head and 1§ in 



interocular width ; maxillary barbel ^ length 



of head 3. P. ansorgii Blgr. 



II. Occipital process in contact with interneui-al 



shield ; snout more than half length of head ; 

 eye 7 times in length of head, \\ in interocular 

 width ; maxillary barbel ^ length of head 4. P. scaphirhynchura Vaill. 



CYPRINODONTIDiE. 



37. Haplochilus singa Blgr. 



Anabantid^, 



38. AxABAS MACULATUS Thomin. 



