CllliY.slCHTHYy. 325 



of head ; pmcmaxillary band of teeth straight, P) to 4 times as hing 



as broad ; vomero-pterygoid teeth forming a narrow baud interrupted 



in the middle, sometimes restricted to the vomerine part ; nasal barbel 



^ to f diameter of eye ; maxillary barbel f (adult) to once (jciing) lengtli 



of head ; outer mandibular barbel about once and ^ as long as inner and 



f to f length of head. Gill-rakers moderate, 12 or lo on lower ])art of 



anterior arch. ])orsal I 6, 1^ to 1^ times as distant fnjm root of caudal 



as from end of snout ; spine feebly serrated behind, ^ to -| length of 



head ; first or first and second soft rays longest, f to once length of head. 



Adipose dorsal not much longer than deep, its ba^e ^ to ':l that of rayed 



dorsal, from whicli it is separated by a space equal to 2 to o times its 



base. Anal 11- Jo, 7 or 8 rays branched. IV-ctoral about jf length 



of head, spine smootli or very feel)ly serrated on outer side, strongly 



serrated on inner side. Caudal deeply forked, with long, acutely ])ointed 



lobes, the u})per the longer and 3 to 4 times as long as middle rays. 



Caudal peduncle 1^ to 1§ times as long as deep. Brown above, silvery 



wliite beneath. 



Total length 240 millirn. 



West African Rivers, from the Gold Coast to the Ogowe. 



1-3. Yg., types. n. Prali, Gold Coa.st. U. B. N. Walkor, Es.j. ((".). 



4. Y<'-. 



r>-l, ,s. Yg. ]{. Offin, 



*.'. Ad., i\'\><.' of (iahoon. ,, 



( '. /xn.^iinilis. 

 ]0-]2. Hgi-. tt yg. Sctte Cama, Gal)oon. ,, 



i;}. Hgr., typo of Ogowe. Miss Kingsley (( '.). 



C '. k'liKjsU'ija!. 



7. rHUYSTCHTHYS AUUATL'S. 



J'hncJiuhis cairafus, Gooff r. Descr. Egyj)t<'. Poiss. [)1. xiv. tigs. '.) ^ 4 (I^SOUj. 



J\)rri/s ((unitii,'^, T. (iC'oflT. oj). cit. ]). ',]{)2 (1827). 



Ahoti ('rata, Rit'aiul, A^oy. P^gypte, \>\. cxcv. (1«S;55). 



BiKjrv.K ((ti)',(fiis, l?iij)|). N. Nachtr. Beschr. Fische Nil, }). 25 (1835; ; Guv. k \i\\. 



U\>t. Poiss. xiv. p. 427 (1830). 

 Jitif/iiis ca/ii/o. ( 'iiv. (k Yal. t. c. p. 4.")0. 

 C/iri/.-icliflif/s ((ii)'(t/iis, Bleek. Acta Soc. >^c. liid.-Xccrl. iv. 18r)8. j). (I,") ; Boillcng. 



Fi-h. Nile. ]). :533, j.k Ix. fig. 1 (li)()7;. 

 ('hrii/iclitliiis cdji'ito. BI(Md\. 1. c. 

 i'/tri//ic/if/if/s iii<nrn/>.<. Giiiitli. (V.t. Fisl). v. )>. 71 (ISiM). Petlieriek's 'ri-a\'. ii. ]>. 230 



(18r)<)). and Proe. Zool. Soc. 1,S'.I<). p. 71'.». ti,L'. 2. 



Depth of body o^ to 5^ times in total length, length of head o/j to 



