1st 2nd 3rd 



Figure \55.—Acantho8tracion 



quadricomis: medial (left) and 



lateral (right) views of pectoral 



girdle, composite based on several 



specimens, 58.2-350 mm SL, Gulf of 



Mexico and Caribbean. 



Figure 156.— /Icanf/iostrocion 

 quadricomis: above, ventral view 



of vertebral column from the 

 fused first five abdominal vertebrae 



to the fourth caudal vertebra, 



showing the haemal spines and the 



displacement of the haemal canal; 



below, ventral view of the basal 



pterygiophores of the anal fin, 



showing the displacement of the 



more anterior pterygiophores to 



the left and to the right of the 



midline; composite based on several 



specimens, 58.2-350 mm SL, 



Gulf of Mexico and Caribbean. 



