1898.] STEIAJf FISHES OF THE FAMILY CICHLID^. 147 



without red borders to the scales ; dorsal grey, with round black 

 spots or red dots or edged with yellow ; anal grey, with or without 

 green spots, edged with j^ellow or red. 

 Total length 330 milhin. 



Lake Ngami. 



4. Pelmatocheomis. 



Pelmatochromis, Steindachner, Notes Leyd. Mus. xvi. 1894, 

 p. 40. 



Characters of Paratilapia, with the addition of a much-developed 

 cushion-like papillose pad of mucous membrane on each side of the 

 palate, close to the upper part of the branchial arches '. 



West Af lica ; Congo. 



Synopsis oftlie Species, 



I. 6 or 7 series of teeth in the jaws ; dorsal XIV 21-12 ; 



pectoral nearly as long as head ; scales very finely 



Q_01 



denticulate on the edge, 26-27 g-^ 1. buettikoferi, B^r. 



II. 2 or 3 series of teeth in the jaws. 



A. Lower lateral line at least nearly as long as 



upper ; pectoral as long as head. 



6 

 Dorsal XIII-XIV 17 ; scales finely denticulate, 40 3 ; 



15 



lat. 1. ^^-^^ 2. jentinki,^i&r. 



4 



93_94 



Dorsal XVI 12 ; scales cycloid, 32 1_ ; lat. 1. ~^^^ ... 3. lateralis, Blgr. 



8 



B. Lower lateral line short, confined to the 



caudal region ; scales cycloid. 



1. Pectoral as long as head ; dorsal XIII 11 ; 



scales 30 ,-T ; lat. 1. — 4. coiifficws, Bl^r. 



2. Pectoral | length of head. 



Dorsal XIV 11; scales 32 -~ ; lat. 1. rj; maxillary 



not extending to below anterior border of eye .5. welwitschi, Blgr. 



Dorsal XVI 9 : scales 31 -^ ; lat. 1. ^5- ; maxillary not 



extending to below anterior border of eye 6. guentheri, SauT. 



Dorsal XIV-XVI 8-9 ; scales 26-28 ^# ; lat. 1. ^ ; 



11 0-9 



maxillary extending to below anterior border of 



eye 7. subocellatus, Qthr. 



1. Pelmatocheomis buettikofeei. 



Paratilapia (Pelmatochromis) biittikoferi, Steindachn. Notes Leyd. 

 Mus. xvi. 1894, p. 40. 



Teeth in broad bands, in about 7 series in the upper jaw, in 6 m 



^ This gives the impression, on a superficial glance under the opercle, of a lobe 

 to the outer branchial arch, as in Geophagus. A similar pad is more or less 

 developed in Tilapia, especially in T. oligacanthus, Blkr., which has for this 

 reason been raised to generic rank {Ptychochromis, Stdr.). 



10* 



