178 THE TANGANYIKA PROBLEM. 



39. Paratilapia aurita. — Blgr. 1901. (Fig., p. 195, middle.) 



Depth of body, 3 to 3! times in total length ; length of head, 3} to 3I times. 



Snout short, as long or a little shorter than the eye, with slightly curved upper 



profile ; lower jaw not projecting beyond the upper ; diameter of the eye, 35 to 3 



times in length of head, equal to or greater than interocular width ; maxillary 



extending to below anterior fourth or third of eye ; teeth in 2 or 3 rows, the outer 



much larger than the others ; 4 or 5 series of scales on the cheek ; large scales 



on the opercle. Gill-rakers short, 10 or 12 on lower part of anterior arch. Dorsal 



XV.-XVII. 9-10 ; spines increasing in length to the last, which is a little less than 



half length of head ; the longest soft rays produced into filaments, and only a little 



shorter than head. Pectoral pointed, as long as head. Ventral produced in a filament, 



and extending to vent or beyond. Anal III. 8 ; third spine stronger and shorter 



than the last dorsal spine. Caudal feebly emarginate. Caudal peduncle, \\ times as 



3 — 4 22 — 2 5 

 long as deep. Scales with finely denticulate border, 35-36 ; lat. 1. -~. 



Brownish, with or without oblique cross bars of mother-of-pearl or silvery white, 

 sometimes with ill-defined dark bars across the back ; a very distinct, blue-black 

 opercular spot ; dorsal and anal grey or blackish, often striated or spotted with white ; 

 the membrane between the dorsal spines edged with black ; anal sometimes 

 blackish. 



Total length, 130 millim. 



Described from numerous specimens from Msambu. 



40. Paratilapia bloyeti. — Sauv. 1883. 



41. Paratilapia pfefferi. — Blgr. 1898. (Fig., p. 205, middle.) 



Teeth small, in 3 series in each jaw, forming a narrow band, outer largest. 

 Depth of body equal to length of head, 2§ times in total length. Snout with 

 straight upper profile, as long as eye, the diameter of which is 3^ times in length of 

 head and equals \h interorbital width ; maxillary extending to below anterior 

 border of eye ; 3 series of scales on the cheek ; large scales on the opercle. 

 Gill-rakers rather long, 11 on lower part of anterior arch, the larger spatulate. 

 Dorsal XVI. 8 ; spines increasing in length to the sixth, which measures a little 

 less than h length of head and nearly equals longest soft rays. Pectoral £ length of 

 head. Ventral reaching origin of anal. Anal III. 7 ; third spine longest, as long 

 as longest dorsal. Caudal feebly emarginate. Caudal peduncle 1 \ as long as deep. 



21 22 



Scales very finely denticulate on the edge, 11% 5 lat - T - ■ Pa -l e olive above, 



silvery beneath, with seven darker vertical bars ; fins greyish brown. 

 Total length, 76 millim. 

 Described from a single specimen from Kinyamkolo. 



42. Paratilapia calliura. — Blgr. 1901. (Fig., p. 175.) 



Depth of body 4 to 4J times in total length ; length of head, 3 to 3J times. 

 Snout pointed, with straight upper profile, as long as or a little shorter than the 



