ODAXOTIIRISSA.— MlOROTHllISSA. 



161 



Anal 21-22. Pectoral f length of head, not reaching ventral. Caudal 

 deeply forked, with pointed lobes. Caudal peduncle a little longer than 

 deep. 44-46 scales in longitudinal series, 14 in transverse series ; 17- 



Fig. 128. 



^. 



•> 



^^^ ' ' / 



1- — - 



OdaxotJirissa loxeirx. 

 Type (A. M. C). f 



18 keeled scutes between isthmus and ventrals, t)-10 betwecu vcntrals 

 and anaL Olive-brown above, white beneath ; a more or less distinct 

 silvery lateral band. 



Total length IGO millim. 



Upper Congo. — I'yj^es in Congo Museum, Tervucren. 

 1. Ono of the types. (k)qnilliatvilfe. i\I. P. \\A\wz (('.). 



% Ad. Ban/.yvilks Ubanghi, C;ipt. Koyaux (C), 



4. MICEOTHRISSA. 

 Bouleng. Ann. Mus. Congo, Zool. ii. p. 2(}> (1902). 



Mouth moderately large, with a series of sharp conical teeth in each 

 jaw ; maxillary toothless, formed of two pieces ; small teeth on the 

 palatines, none on the tongue. Branchiostegal rays 6. Body strongly 

 compressed, with an abdominal serrature formed of bony scutes ; scales 

 moderate ; no lateral line. Dorsal fin short, behind vertical of ventrals ^ 

 anal rather long, with 23 to 25 rays. Ventrals with 9 rays. 



Congo. 



1. MICROTHRISSA ROYAUXL 

 Bouleng. 1, c pi. viii. fig. 1. 



Deptli of body 3 to ^ times in total length, length of head oj to 4 

 times. Snout rounded, shorter than eye, which is 3 to 3 J times in length 

 of head and a little greater than intcrorbital width ; jaws equal in front ; 



VOL. I. ij 



