GILBERT AND STARKS — FISHES OF PANAMA BAY 



63 



Measurements in Hundredths of Length without Caudal. 



Length in mm., from tip of snout to base of 

 caudal 



Head from tip of snout. 

 Depth 



Orbit 



Insertion ventral spine from tip of snout. 



Spinous dorsal from snout 



Soft dorsal from snout 



Length of pectoral 



Longest dorsal ray 



Longest anal ray 



Number of dorsal rays and spines 



Number of anal rays and spines 



Number of scales 



290 



31 



131 

 5f 

 41 

 44 

 7oi 

 13 



Hi 

 lOi 



v-i,9 

 II, 8 

 110 



Family POLYNEMID^. 

 121. Polydactylus approximans {TAty & Bennett). 



Common but much less abundant than P. opercularis, and much less valuable 

 than the latter as a food-fish. 



Measurements in Hundredths of Length without Caudal. 



Length in mm. 



Head 



Depth 



Maxillary 



Spinous dorsal from snout 



Distance from front of spinous dorsal to soft dorsal.. 



Length of pectoral 



Longest detached ray 



Longest dorsal spine 



Longest dorsal ray 



Dorsal 



Anal 



Scales 



205 

 32 

 29 

 14 



39 

 27 

 28 



39 

 22 

 20 



VIII-1,12 



111,14 



62 



