980 



MR. C. TATE REGAN O^ 



Teeth soniewliat compressed, pointed ; anal fin of male 

 with first produced ray not serrated, third longer 



than posterior branch of second 8. Heterandria. 



Teeth broad incisors; anal fin of male with first pro- 

 duced ray serrated not far from tip, third shorter 



than posterior branch of second 9. Pseudopoecilia, 



*** Mouth small, transverse ; teeth movable, 

 oar-shaped. Extremity of anal fin of 

 male supported equally by first and 

 anterior branch of second produced 



rays: first not serrated 10. Foecilinpsis. 



p. Anal fin of male short, ending in a small 

 retrorse hook formed by second and 

 third produced raj-s ; teeth conical or 



villiform 11. JBracliyrlia2yMs. 



y. Anal fin of male long and slender, not 

 ending in an antrorse hook. 

 Bones of lower jaw firmly united; teeth conical or villi- 

 form, fixed 12. Leptoj'Jiaphis. 



Bones of lower jaw loosely connected; teeth more or less 



expanded and compressed, movable 13. PhaUoptyclms, 



2. First produced ray of anal fin of male ending 



in an antrorse appendage ; mouth small, but 

 bones of lower jaw rather nrmly joined. 

 Appendage forked, each fork antler-like; teeth oar- 

 shaped 14. Fhalloceros. 



Appendage not forked, long, doubly curved, pointed; 



teeth chisel-shaped 15. Cnesterodon. 



3. First produced ray of anal fin of male bearing 



a pair of curved horn-like processes not far 

 from its end. 



a. Bones of lower jaw firmly united. 



Teeth chisel-shaped; outer series close-set 16. GJaridicJitJit/s. 



Teeth spear-shaped ; outer series spaced 17. Toxus. 



b. Bones of lower jaw loosely connected ; teeth 



movable 18. Oirardinus. 



B. Pelvic fins enlarged in the males, the second ray 

 longest. 



1. Bones of lower ja\V firmly united ; outer series 



of teeth slender, pointed 19. PcanpJioi-icJdht/s. 



2. Bones of lower jaw rather firmly united ; outer 



series of teeth broad incisors 20. Pamplioria. 



3. Bones of lower jaw loosely connected ; outer 



series of teeth slender, curved, oar- or spoon- 

 shaped ; intromittent organ short. 



a. Extremity of intromittent organ unpro- 



tected ; first produced VAy with terminal , 



hook and strong subterminal serrations ; 

 anterior branch of second hooked forward ; 

 posterior branch of second with distal seg- 

 ments produced into serrations beyond 

 extremity of third. 

 Thii'd produced ray without hook ; anterior branch of 

 second unsegmented distally ; caudal similar in both 



sexes. I)orsal 9-11 21. Plati/pcecilus, 



Third produced ray ending in a I'etrorse hook ; anterior 

 branch of second segmented throughout; caudal 

 of male with lower rays produced into a long 

 pointed appendage. Dorsal 11-15... 22. Xiphnpliorus. 



b. Extremity of intromittent organ protected by 



a hood of thick skin that can be slipped otf 

 frontwards, being attached only at its base 

 to the first prolonged ray. 

 a. First prolonged ray tapering evenly, sharply 

 serrated distallj'. 



