from, the Quanza and Bengo Rivers. 557 



Ten specimens, measuring 50 to 200 mm., from the 

 Bengo River and from the Lucalla River at Lucalla. 



Distinguished from the preceding principally by the 

 longer barbels and lower number of anal rays. 



37. Physailia ansorgii, sp. n. 



Depth of body 4J times in total length, length of head 

 5 times. Snout broad, rounded, not projecting beyond 

 mouth, a little shorter than eye ; latter perfectly lateral, 

 3 times in length of head, and a little less than interocular 

 width, which equals width of mouth. Nasal barbel | total 

 length, maxillary and mandibular \. Pectoral as long as 

 head, extending beyond root of ventral, spine serrated on 

 inner side. Ventrals very small, 2h times as distant from 

 caudal as from end of snout. Anal 60-65, narrowly 

 separated from caudal, which is deep!}- forked, with pointed 

 lobes. Yellowish, more or less dotted with black, especially 

 on the back and anal fin ; lateral line black. 



Total length 63 mm. 



Two specimens from the Quanza River at Cunga. 



Intermediate between P. pellucida, Blgr., and P. soma- 

 lensis, Yincig. j distinguished from the former by lunger 

 barbels, from the latter by the serrated pectoral spine. 



38. Chrysichthys acutirostris, Gthr. 



Quanza, Lucalla, and Bengo Rivers. 

 Native name : Msolo. 



This species was only known from the single type 

 specimen, obtained by Welwitsch at Goluugo Alto. 



39. Chrysichthys bocagii, sp. n. 



Depth of body 4^ to 4§ times in total length, length of 

 head 3i times. Head moderately depressed, 1^ times as 

 long as broad, its upper surface slightly rugose, covered 

 with thin skin ; occipital process narrow, extending to the 

 small interneural shield ; snout obtusely pointed ; eye 3^ 

 to 4 times in length of head, 1^ to 1^ times in interocular 

 width ; mouth inferior, its width 2-g "times in length of 

 Lead; praemaxillary band of teeth nearly straight, 3 times 

 as long as broad ; vomero-pterygoid teeth not much 

 developed, forming a narrow baud interrupted in the 

 middle; nasal barbel 1 to l.l diameters of eye, maxillary 

 1-1 to 1| length of head, outer mandibular f to f, inner 

 mandibular = to i. Gill-rakers rather long, 15 to 17 on 



