1 72 THE TANGANYIKA PROBLEM. 



increasing in length to the last, which slightly exceeds longest dorsals. Caudal 



— i 



1 6 



rounded. Caudal peduncle a little longer than deep. Scales 48 ; lat 



3° 



— . Pale brown, most of the scales dark-edged ; a blackish obliqe bar from 



below the anterior third of the eye to the maxillary ; a large blackish opercular 

 spot ; three oblique blackish bands, descending forwards, on each side of the 

 back, extending on the base of the dorsal ; dorsal and anal tipped with blackish. 



Total length, 107 millim. 



Described from a single specimen. 



This species takes its place in the series between L. moorii and L. congoensis. 



31. Lamprologus hecqui. — Blgr. 1899. 



32. Lamprologus moorii. — Blgr. 1898. (Fig., p. 203, upper.) 



Nine or 10 equal, moderately large conical teeth in front of each jaw, followed 

 by a narrow band of minute teeth ; lateral teeth very small. Depth of body 2k times 

 in total length, length of head 3 to 3^. Snout as long as diameter of eye, which is 

 3 to 3^ times in length of head and equals interorbital width ; maxillary extending 

 to below anterior border of eye ; cheeks with small, deciduous scales ; opercles and 

 occiput scaled. Gill-rakers short, 9 or 10 on lower part of anterior arch. Dorsal 

 XIX. -XX. 8-9; spines slightly increasing in length to the last, which measures 

 nearly half length of head ; middle soft rays prolonged at least f length of 

 head. Pectoral | to J length of head. Ventral prolonged into a long fila- 

 ment. Anal VII. -VIII. 6-7 ; spines increasing in length to the last, which 

 is a little longer than the longest dorsal ; middle soft rays prolonged into 

 filaments. Caudal rounded. Caudal peduncle as long as deep. Scales 33-35 



5—7 24—28. 



" lat. I Dark brown ; fins blackish. 



11— 12 9—13 



Total length, 93 millim. 

 Described from several specimens from Mbity Rocks and Kinyamkolo. 



33. Lamprologus brevis.— Blgr. 1899. 



34. Lamprologus compressiceps. — Blgr. 1899. (Fig., p. 205, upper.) 



A few moderately large curved canine teeth in front of each jaw, followed by 

 a narrow band of minute teeth ; lateral teeth very small, curved. Depth of body 

 2j to 2| times in total length, length of head 2jj to i\. Head very strongly 

 compressed, with concave upper profile ; snout a little longer than diameter of eye, 

 which is 4 times in length of head and equals 1^ interorbital width ; maxillary 

 extending to below anterior border of eye ; cheeks naked, opercles and occiput with 

 small scales. Gill-rakers moderately long, 15 on lower part of anterior arch. 

 Dorsal XX. -XXI. 6 ; spines increasing in length to the sixth, which measures half 

 length of head, the posterior a little shorter ; longest soft rays a little longer than 

 longest spines. Pectoral h to | length of head. Ventral prolonged into a 



