CENTRAKCHID^. 



31 



The most striking differences are shown in the following comparative 

 table of characters : — 



C . m acropt eru s, ( Lac. ) .Tor. , 

 Ocmulgee Kiver, Ga. 



C. irideus, (Lac.) C. & V., 

 Coosa Eiver, Ala., Neuse 

 Kiver, N. C. 



Dorsal rays (usually) 



Anal rays (usually) 



Head iu leugt h 



Depth in length 



Lateral line 



Ventral spine iu head 



Ventral spine reaching 



Longest dorsal spine in head . . 

 Longest soft dorsal ray in head 

 Longest soft anal ray in head.. 

 Mandible 



XII, 12 



VIII,14 



3 



2i 



5-43-12 



If 



4th anal spiue 



u 



H 



1^ 



More than half head 



XI, 12. 

 VII, 14. 



3*. 



2. 



5-44-14. 



21 



Not to vent. 



If. 



If. 



li- 



Less than half head. 



The coloration in the two species appears to be essentially the same. 

 GENERA OF CENTRARCHID^. 



Prof. Gill now recognizes sixteen genera of CentrarcMdce, for which, 

 he suggests the following sequence, beginning with the most general- 

 ized type, Micropterns. 



Subfamily Micropterin^, GUI. 



1. 3ficropterus, Lac6pede. 



Subfamily Lepiopomin^, Gill. 



§1. 



4. Archoplites, Gill. 



2. Chcenohryttus, Gill. 



3. Amhloplites, Kaf. 



6. Apomotis, Eaf. 



7. Lepiopomus, Eaf. 



8. Xenotis, J or ddn. 



12. Enneacanthus, Gill. 



13. JSemiopliteSy Cope. 



5. Acantharchus, Gill. 



§2. • 



9. Xystroplites, Jordan. 

 10. Uupomotis, Gill & Jordan. 



§3. 

 11. Mesogonistius, Gill. 



§4. 



14. Copelavdia, Jordan. 



