from the Quanta and Bctiijo Rivers. 557 



Ten spcciraensj racasuriu}^ 50 to 200 niiii.^ from the 

 lifiij^o River and from the Liiealla Kiver at Luealla. 



iJistinj^uislied from the pi'eceding- principally by the 

 longer barbels and lower numbir of anal rays. 



37. riiysailia ansorgii, sp. n. 



Depth of body -li 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 c(|uals width of mouth. Nas-ial barbel r total 

 length, maxillary and mandibular ^. Pectoral as long as 

 head, extending beyond root of ventral, spine serrated on 

 inner side, ^'entrals very small, 2]^ times as distant I'rom 

 caudal as from end of snout. Anal G0-G5, narrowly 

 separated from cautlal, which is deeply forked, with })ointed 

 loljcs. Yellowisli, more or hss dotted with black, especially 

 on the back and anal fin ; lateral line black. 



Total length G3 mm. 



Two specimens from the Quanza lliver at Cunga. 



Intermediate between P. jjc/luch/a, Blgr., and P. aomu- 

 h'lisis, Yincig. ; distinguished from the former by longer 

 barbels, from the latter by the serrated pectoral spine. 



38. Chrysichthys acutirostris, Gthr. 



Quanza, Luealla, and Bengo Kivers. 

 Native name : JMsolo. 



This species was only known from the single type 

 specimen, obtained by AVelwitsch at Golungo Alto. 



39. Chrysichthys bocayii, sp. n. 



Depth of body 4^ to 45 times in total length, length of 

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

 long as broad, its upper surface slightly rugose, covered, 

 with thin skin; ceeipital proce>s narrow, extending to the 

 small intcrneural shield ; snout obtusely pointed ; eye 3i 

 to 4 times in length of head, l.\ to 1^- times in inteiocular 

 w idth ; mouth inferior, its width 2^ times in length of 

 head ; prsemaxillary band of teeth nearly straight, 3 times 

 as long as broad ; vomero-pterygoid teeth not mueh 

 developed, forming a narrow baiul interrupted in the 

 middle; nasal barbel 1 to 1). diameters of eye, nuxxilhiry 

 11 to 1| length of head, outer mandibular | to ^, inner 

 mandibular 5 to ^. Gill-rakers rather long, 15 to 17 on 



