446 



TELEOSTEI 



Family POMACENTRIDAE. The subocular shelf is preserved. Brilliantly 

 coloured marine fish, with gills reduced to three and one hemibranch. 

 Outwardly they resemble the Chaetodontidae. 



Heliastes, C. and V. ; Atswrina, J. and E. ; Pomacentrus, Lac. ; 

 Dascyllus, Cuv. (Fig. 458) ; Amphiprion, Bl. Schn. warm seas. 



Family CICHLIDAE. Freshwater fish, without subocular shelf or 

 supramaxilla, and with a suture separating the pharyngeals. 



Tilapia (Chromis), Smith ; Tropheus, Blgr. ; Lamprologus, Schilt. ; 

 Hemichromis, Pet. ; Asprotilapia ; Plecodus, Blgr. ; Pseudetroplus Africa. 



B. 



FIG. 462. 



Pseudoscarus muricatus, C. and V. Parrot fish ; from specimens in British Museum. The 

 upper and lower jaws. A, outer left-side view ; B, view of the jaws cut vertically, a.c, alveolar 

 cavity in which young teeth develop ; d, dentary ; o.t, old worn teeth near edge of jaws, (irmly 

 held m bony cement ; pm, premaxilla ; y.t, loose young teeth about to replace older teeth. 



Acara, Hekl. ; Heros, Hekl. ; Cichla, Cuv. ; Chaetobranchus, Hekl. ; 

 Geophagus, Hekl. America. Etroplus, C. and V. ; E. Indies. 



2. With normal nostrils and subocular shelf. 



Family EMBIOTOCIDAE. Viviparous fish, with deep furrows along 

 the base of the dorsal fin. The anal may be peculiarly modified in 

 the male. 



Abeona, Gir. ; Cymatogaster, Gibb. ; Embiotoca, Ag. ; Dilrema, Schl. 

 (Fig. 459) ; Hyst&rocarpus, Gibb. Pacific. 



3. With normal nostrils, and no subocular shelf. Gills reduced to 

 three and one hemibranch. 



Family LABRIDAE. The Wrasses are brilliantly coloured marine fish, 



