COEEMATODUS— EEETMODUS. 495 



than long, shorter than postocular part of head ; eye 4| times in length 

 of head, twice in interorbital width ; mouth extending to below anterior 

 border of eye ; 4 series of scales on the cheek, depth of scaly part equal 

 to diameter of eye. Gill-rakers moderately long, 12 on lower part of 

 anterior arch, last bifid. Dorsal XVI 10 ; spines increasing in length 

 to the last, which is §■ length of head. Anal III 8; third spine as long 

 as and thicker than middle dorsals. Caudal peduncle lh times as 

 long as deep. Scales slightly rugose, 34 ^ ; lateral lines y . Body 

 with traces of six black cross-bars. 



Total length 200 millim. 



Upper Shire River. 



1. Type. Upper Shire. Dr. Percy Randall (C). ; 



Sir H. H. Johnston (P.). 



34. ERETMODUS. 

 Bouleng. Tr. Zool. Soc. xv. 1898, p. 16, and Poiss. Bass. Congo, p. 483 (1901) ; 

 Pellegr. Hem. Soe. Zool. Fiance, xvi. 1904, p. 360. 



Body moderately elongate ; scales ctenoid ; two incomplete lateral 

 lines. Jaws with rather large spatulate teeth with truncated crowns 

 disposed in oblique transverse rows of two or three ; maxillary concealed 

 when the mouth is closed. Dorsal with 23 to 25 spines, anal with 3. 

 Toothed portions of prse maxillary and mandible much developed in 

 depth ; parietal and occipital crests extending to between the orbits. 

 Vertebra; 30 (15 + 15). 



Lake Tanganyika. 



1. ERETMODUS GYANOSTICTUS. 



Bouleng. ll.ee, Tr. pi. hi. fig. 5; Pellegr. I.e.; Bouleng. Tr. Zool. Soc. xvii. 

 1906, p. 574. 



Depth of body equal to length of head, 3 times in total length. Head 

 twice as long as broad ; snout as long as broad, very convex, 1^ to 1^ 

 times as long as eye, which is 4-| to 5 times in length of head and a 

 little less than interorbital width ; mouth with much developed lips, 

 extending to below nostril, or between nostril and eye ; teeth with 

 reddish-brown crowns, in 8 to 12 rows in each jaw; cheek and opercle 

 naked. Gill-rakers short, 9 or 10 on lower part of anterior arch. 

 Dorsal XXIII-XXV 3-5 ; spines subequal from the sixth, about ^ 

 length of head, a little shorter than soft rays. Anal III 6-7 ; third 



