1G8 



CAUFOUNIA ACADEMY OF SCIENCES 



Til llu'ir List of American (Jobiida', Eigenmann and Eigcnmann (18RS, 

 p. 52) tlistingiiisli the Atlantic aiul Tacilic species of PhUi/pnu!< ( /'. (hnmitnr and 

 /'. iitlfialis) by the size of tiie scales, the lengtb of the bead, and tbe number of anal 

 rays. In going over tiiis ground later, Jordan and Evermann (1808, p. 2195) state: 

 "Tbe only constant difference between tins species [/'. lateralis] and Phili/pniis 

 dormitor seems to be tbe brighter coloration of lateralis." 



We have examined in tbis connection five specimens of /'. dormitor, and thir- 

 teen specimens of P. lateralis. These bear out in tbe main the dilTerenccs assigned 

 by Eigcnmann. In P. dormitor, the head averages shorter, although the extreme 

 of variation includes some measurements of P. lateralis. The scales are smaller in 

 P. dormitor, although here again there is an overlapping in the fornuihe. IJut in 

 /'. dormitor the anal i-ays are constantly 10, while in /'. lateralis they are constantly 11. 

 Below are data for individual specimens examined: 



P. DORMITOR. 



We have not sufficient material to enable us to decide whether there are any 

 constant differences in coloration. The young of both species are marked by a 

 longitudinal band, interrupted, or narrowed at intervals by incursions of the ground 

 color. The only young specimen of /\ dormitor in our possession shows three con- 

 spicuous cross-bars on tbe back: one under posterior portion of spinous dor.sal, con- 

 tinued on tbe fin as a jet-black bar traversing its posterior and distal half; the 

 second, immediately behind the soft dorsal; the third, much narrower, just in advance 

 of the caudal fin. These become faint in adults, but we find traces of them in all our 

 specimens. Where traces of these bars exist in Pacific material before us, they are 

 very faint, even in brightly colored young, and do not involve the spinous dorsal. 



