GEAMMATOTEIA. — TEEMATOCAEA. 455 



uniform or with irregular darker blotches ; a brown opercular spot ; 

 a brown spot sometimes present at the root of the caudal ; dorsal 

 greyish with round light spots and finely edged with black ; anal and 

 ventrals yellowish. 



Total length 210 millim. 



Lake Tanganyika. — Type in Congo Museum, Tervueren. 



1. Ad. Niamtolo. Dr. W. A. Ounnington (C). 



2. Skel. 



3. Ad. Kasawn. „ 



4. Ad. Kilewa Bay. Dn L. S tappers (C). 



5. Ad. Moliro. „ 



6. Ad. Kapampa. „ 



25. TREMATOCARA. 



Bouleng. Tr. Zool. Soc. xv. 1899, p. 89, and Poiss. Bass. Congo, p. 444 (1901) ; 

 Pellegr. Mom. Soc. Zool. France, xvi. 1901, p. 365. 



Body moderately elongate ; scales cycloid ; a single lateral line, the 

 upper, reduced to a few tubules. Teeth very minute, conical, in a 

 narrow band ; maxillary entirely concealed under the proeorbital when 

 the mouth is closed. Nasal, frontal, prae- and suborbital, prseopercular, 

 and mandibular bones with very large and deep cavities separated by 

 narrow septa and covered with a thin skin. Dorsal with 9 to 12 spines, 

 anal with 3. Vertebrae 31 (12 + 19). 



Lake Tanganyika. 



Synojms of the Species. 



D. IX-X 11 ; A. Ill 10 ; Sc. 28-30 f ; 10-16 gill- 

 rakers on lower part of anterior arch ; caudal [p. 455. 



peduncle 1^ times as long as deep 1.2'. marginatum, Blgr., 



D. X 11-12 ; A. Ill 10 ; Sc. 29-30?; 20-21 gill- 

 rakers ; caudal peduncle li times as long as [p. 456. 



deep 2. T. nigrifrons, Blgr., 



D. X-XII 9-11; A. Ill 7-8 ; Sc. 30-32^; 17-18 



gill-rakers ; caudal peduncle nearly twice as [p. 457. 



long as deep 3. T. unimacidatum, Blgr., 



1. TREMATOCARA MARGINATUM. 

 Bouleng. Tr. Zool. Soc. xv. 1899, p. 89, pi. xix. fig. 1, Ann. Mus. Congo, Zool. i. 

 p. 142, pi. liv. fig. 1 (1900), and Poiss. Bass. Congo, p. 444 (1901) ; Pellegr. 

 Mem. Soc. Zool. France, xvi. 1904, p. 366 ; Bouleng. Tr. Zool. Soc. xvii. 

 1906, p. 570. 



