SPATHODUS: — PERISSODUS. 



497 



nostril; teeth with reddish-brown crowns, 16 to 20 in each jaw ; cheek 

 and opercle naked. Gill-rakers short, 10 on lower part of anterior 

 arch. Dorsal XXI II 5 ; spines snbequal from the fifth, -g- length of 

 head ; longest soft rays J length of head. Anal III 6-7 ; third spine a 

 little longer than longest dorsals. Pectoral | length of head. Ventral 

 reaching anal. Caudal rounded. Caudal peduncle deeper than long. 



3 23 



Scales feebly denticulate, 30-31 j^ ; lateral lines ^q- Blackiish brown, 

 belly whitish ; caudal fin edged with whitish. 



Total length 70 millim. 



Lake Tanganyika. — Type in Congo Museum, Tervueren. 

 1. One of the types. Albertville. Capt. Hecq (C). 



Fig. 344. 



t 



Sjiathodiis eri/t/irodoit. 

 Type (A. M. C). 



3t;. PERISSODUS. 



Bouleng. Tr. Zcol. So-, xv. ]Hi»«, p. 20. and Poiss. Ba^s. (Jongo, p. 4.8.') (1901); 

 Pellegr. Mem. Soc. Zool. Fr.mef, xvi. 1904, p. 3G]. 



Body elongate, covered with small cycloid scales; two incomplete 

 lateral lines. Teeth rather large, unequal in size, few, with swollen 

 base and low slightly notched crown, compressed transversely to the 

 axis of the jaws, disposed in a single series; maxillary exposed. Dorsal 

 with 18 spines, anal with 3. Vertebrye 35 (17 + 18). 



liake Tanganyika. 



]. PERISSODUS MTCROLEPIS. 

 Bouleng. 11. ec., Tr. p. 21, pi. vi. fig. 2 : Pellegr. t. <•. p. '^i'>2. 



Depth of body of times in total length, length of head 'ij time'J. 

 Head 2 1 times as long as broad ; ?snout a little broader tlian \onii;. a 



