SCIENTIFIC HISTORY OF THE BLACK BASS. 21 



Scales of interopereulum uniserial 



Covering only about half the Covering the entire Avidth of 



width of the bone. the bone. 



Scales of preo2:)erculav limb 



None. Developed in an imperfect row 



{e. cj.^ 3-5 in number). 



Scales on dorsal 

 Developed as a deep sheath (in- Developed as a low (obsolete) 



volving last spine) of small scales shallow sheath, and with series 

 differentiated from those on the ascending comparatively little 

 back, and with series advancing on membrane behind the rays 

 high up the membrane behind (none behind the last five or 

 each ray (except last two or six), 

 three). 



Scales on anal 



Ascending high behind each None (or very few), 



ray. 



Month 

 Moderate. Large. 



Siipramaxillarij 



Ending considerably in front of Extending considerably behind 



hinder margin of orbit (aljout the posterior margin of orbit, 

 under hinder border of pupil). 



Bays 



Dorsal, articulated, 13. Dorsal, articulated, 12 (I. 11). 



Anal III, 10-11. Anallll, 10. 



Pectoral, MG-MT. Pectoral, 114 (1 -13). 



Dorsal Jin in front of soft portion 



Little depressed, the ninth spine Mnch depressed, the ninth sjiine 



being only about a half shorter being only about a fourth as long 



than the longest (3, 4, 5) and a as the longest and half as long 



fourtli shorter than the tenth. as the tenth. 



