PERCIB.E. 57 



II. Groiij) with the type of Sen-anus. — Mostly inhabitants of the 

 sea. Form of the body oblong, rarely elevated. Opercles denticulated 

 or armed. Scales conspicuously ctenoid, small, or of moderate size. 

 Cleft of mouth slightly o])lique. Mostly with one dorsal ; the number 

 of spines constant, or little variable in the species of one genus. 

 Sometimes more than ten pyloric appendages. Serranina. 



19. Aprion. 2G. Seheanus. 33. Aulacocephalus. 



20. Apsilus. 27. Plectropoma. 34. Diploprion. 



21. Centhopristis. 28. Trachypoma. 35. Myriodon. 



22. Callanthias. 29. Polyprion. 36. Genyohoge. 



23. Anthias. 30. Pogonoperca. 37. Mesoprion. 



24. Anyperodon. 31. Grammistes. 38. Glaucosoma. 



25. Prionodes. 32. Rhypticus. 



III. Oroup with the type of Pentaceros. — Osseous scales or jm'o- 

 tuberances, or the integuments of the head bony. Pentaceratina. 



39. Pentaceros. 40. Obeosoma. 



IV. Group ivith the type of Prlacanthus. — Cleft of the mouth aj)- 

 proaching the vertical line, chin prominent ; scales small, strongly 

 ctenoid, rough ; the number of spines constant ; fe^y pyloric append- 

 ages. Priacanthina 

 41. Phiacanthus. 



V, Oroup ivitli the type of Apocjon. — Inhabitants of the sea and of 

 fresh waters, Avith deciduous scales generally of large size. Form of 

 the body more or less elevated. Opercles mostly denticulated or 

 armed ; cleft of the mouth oblique, or approaching the vertical Une. 

 Two dorsals. Apogonina. 



42. Ambassis. 46. Chilodipterus. 



43. microichthys. 47. scombrops. 



44. Apogon. 48. Poaiatomus. 



45. Apogonichthys. 49. Acropoma. 



VI. Oroup with the type of Orystes. — Inhabitants of the sea and 

 chiefly of fi-esh waters. Foim of the body oblong or elevated. Oper- 

 cles indistinctly denticidated or armed, or entirely smooth. Scales mi- 

 nutely ciliated, or cycloid. Cleft of the mouth more or less oblique. 

 Mostly with one dorsal ; sjiines sometimes in variable number in one 

 genus. Sometimes many pyloric appendages. Fishes deviating most 

 from the original type of the Percoids ; and Dules approaching to the 

 Theraponida. Grystina. 



50. Olig GRITS. 54. Percilia. 68. Anoplus. 



51. Grystes. 55. Centrarchus. 59. Odontonectes. 



52. Arripis. 56. Bryttus. GO. Dules. 



53. IIURO. 57. POMOTIS. 



