SCHUBOTZIA.— XEXOUHKOMIS. 501 



3| to 31 times in length of head, equal to interorbital width, and twice 

 piEeoibital depth ; mouth with rather thick lips, extending to below 

 anterior border of eye or a little beyond ; 50 to 54 teeth in outer series 

 of upper jaw ; 3 or 4 series of scales on the cheek, width of scaly 

 part less than diameter of eye. Gill-rakers moderately long, 8 or 9 

 on lower part of anterior arch. Dorsal XV-XVI 8-9 ; spines increasing 

 in length to the last, which measures f to ^ length of head ; longest soft 

 rays f length of head. Anal III 7-8. Pectoral as long as head, 

 extending to vertical of origin of anal. Ventral reaching origin of 

 anal or beyond. Caudal truncate. Caudal peduncle 1^ to 1^ times as 

 long as deep. Scales finely denticulate, 31-82 ^f^. ; lateral lines 'f^- 

 Male yellowish brown in front, brown behind, with dark brown bars ; 

 two dark brown bars across the snout, a broader bar from eye to eye 

 across the back of the head, and a vertical bar below anterior half of 

 eye; fins yellowish, anal with two large bright, dark-edged ocellar spots. 

 Female pale brown above and silvery white beneath, without markings 

 except a dark opercular spot; dorsal and caudal pale greyish, M'ith or 

 without small round darker spots, other fins white. 



Total length 95 millim. 



Lake Albert Edward. — Types in Berlin Musemm. 



]. One of the types. L. Albert Edward. Dr. H. Schubotz (C.) ; 



German C. African Exped. 



39. XENOCHROMIS. 



Bouleng. Ann. Mus. Oungo, Zool. i. p. 125 (1899), and Poiss. Bass. Congo, 

 p. 486 (1901); Pellegr. Mem. Soc. Zool. France, xvi. 1904, p. 363. 



Body elongate, covered with small cycloid scales; two lateral lines, 

 the upper nearly complete. Teeth in a single series, small, compressed, 

 lamellar and a little concave in front, obtusely pointed, strongly curved, 

 equal in size, close together and pressed against the edge of the jaw; 

 maxillary exposed. Dorsal with 16 or 17 spines, anal with 3. Parietal 

 and occipital crests very strong, extending to between the orbits. 

 A^ertebrfE 35 (17-f 18). 



Lake Tangan}ika. 



