GILBEKT AND STARKS — FISHES OF PANAMA BAY 



95 



Measicrements in Hundredths of Length u'ithoitt Caudal. 



Length in mm. without projecting lower jaw or 

 caudal 



Head without lower jaw 



Depth , 



Eye 



Interorbital (bone only) 



Maxillary 



Third dorsal spine 



Fourth dorsal spine 



Fifth dorsal spine 



Second anal spine 



First anal ray 



Second dorsal ray 



Pectoral 



Ventral 



Caudal 



Caudal peduncle (height) 



Vent from front of anal 



Distance from anal to base of ventral spine . 

 Longest gill-rakers 



242 



17 



Family SEREANID^E. 

 166. Petrometopon panamensis {Steindachner) . 



This species is seldom brought to the market, though it is very abundant about 

 the islands in Panama Bay. 



The excavation in the frontal bones for the reception of the posterior processes 

 of the premaxillaries is not so deep as in P. guUaiiis. It more nearly resembles in 

 this respect Epinephelus louti, as figured by Boulenger (1895, p. 173). 



To the type description we add the following range of measurements, taken 

 from specimens 19 to 28 cm. in length: Head 2f to 2|- in length, without caudal. 

 Eye 5| to 6 in head: interorbital width (bone) 94-; snout 3J to 4. The fin formula 

 seems to be constant as described: Dorsal IX, 14; anal III, 8. The small canines 

 anteriorly in each jaw are sometimes paired on one or both sides. 



