PHEACTURA. 499 



without free border. Gill-openings narrowly interrupted at the isthmus. 

 Air-bladder absent. 



Vertebrae 35-36 (16-174-18-20). 



Niger, Cameroon, Ogowe, Congo. 



Synopsis of the Species. 



I. Occipital process not reaching interneural shield ; snout about ^ length 



of head. 



A. Posterior nostril nearly as distant from eye as the anterior from end of snout. 



1. Occipital process 3 to 4 times as long as broad. 

 Eye 10 to 11 times in length of head, 2^ to 3 



times in interocnlar width; maxillary barbel 

 ^ length of head ; caudal peduncle ^ total 



length LP. hovel, Perug., p. 499. 



Eye 6 to 7 times in length of head, twice in 

 interoeular width ; maxillary barbel \ length 

 of head ; caudal peduncle ^ to ^ total 

 length 2. P. llndlca, Blgr., p. 500. 



2. Occipital process about twice as long as broad ; maxillary -barbel ^ to ? 



length of head. 



Eye G to 7 times in length of head, twice in inter- 

 ocular width ; caudal peduncle | to f total 

 length 3. P. brevicauda, Blgr., .p. 502. 



Eye G to 7 times in length of head, twice in 

 interoeular width ; caudal peduncle ^ to 5 

 total length 4. P. intermedia, Blgr., p. 503. 



Eye 5^ times in length of head, 1^ times in 

 interoeular width ; caudal peduncle f total 

 length 5. P. Jomficuxda, Blgr., p. 504. 



B. Posterior nostril close to the eye ; head 



rugose above, with strong ridges ; caudal 



peduncle I total length G. P. ansorc/ii, Blgr., p. 504. 



II. Occipital process in contact with inter- 



neural shield ; snout more than ^ length 



of head ; maxillary barbel \ length of [p. 505. 



head ; caudal peduncle \ total length . 7. 7*. sraphirhi/nchura, A aill., 



1. PHRACTURA BOVEI. 



Peltura hovei, Perugia, Ann. Mus. Genova, (2) x. 1892, j). 972, fig. 

 l^hradnra Jxrvei, Bouleng. Ann. & Mag. 2\. H. (7j vi. j). 528, and Poiss. Bass. 

 (Jon 00, p. :{;i4 (1901). 



Depth of body 8 or 9 times in total length, length of head G to G^ 



57 Bou I/II 



