PETllOCErilALUS. 



53 



10 or 12 round caucUil peduncle. Brown above, silvery below ; a dark 

 spot at base of caudal, and another below origin of dorsal. 



Total length 170 millim. 



Ogowe, Congo. — Type in Paris Museum. 



1. Ad. (Type of M. aml>h/.4om<(.) Taliigoug;i, O^owp.. Miss Kingsley (C.). 

 2—4. Ad. ct ligr. Koiuadckke, Ogowo. Dr. W. J. Ansorge (C). 



5. PETHOOEPHALU.S SIM US. 

 Suuv. Bull. Soc. Pliiloin. (7) iii. 1878, p. 100 ; Boulcng. Proo. Zool. Soc. 1808, 



p. 780, and Poiss. Bass. Cougo, p. 73 (1001); Pai)penli. Mittli. Zool. Mus. 



Boil. iii. 1007, p. 344. 

 Mornu/rus {P etwee phaUis) slmvs, Sauv. N. Arch. Mus. (2) iii. 1880, p. 51, 



pi. ii. fig. 3. 

 Moi-Dijjrus teni(icai(J((, Stcind. Notes Levd. Mus. xvi. 1804, p. 60, }>!. vi. fig. 1. 

 Mornn/rus siiuu.'!, Giintli. Ann. & Mag. N. H. (0) xvii. 180t>, p. 282. 



Depth of body 2f to oj times in total length, length of head 3| to 4^ 

 times. Head as long as deep, with convex upper profile ; snout very 

 short, J length of head, obliquely truncate, projecting beyond mouth ; 

 mouth below anterior border of eje, its width y to ^ length of head ; 

 teeth bicuspid, 10-18 in upper jaw, 16-24 in lower ; nostrils near lower 

 border of eye ; eye rather large, a little longer than snout, § inter- 



Fiff. 38. 



l\t)'oceph<(his sintus. 

 Type, after Sauvage (N. Arch. Mus. 1880). 



orbital width. Dorsal 24-28, originating above 5th to 7th ray of anal, 

 its length IJ to 2 times in its distance from head, and equal to or 

 slightly greater than its distance from caudal. Anal 30-34, equally 

 distant from base of ventral and from base of caudal. Pectoral pointed, 

 I length of head, twice as long as ventral, extending beyond base of 

 latter. Caudal scaled at the base, Mith pointed lobes. Caudal peduncle 



