PISCES 



147 



The Mackerel family (Scombridce) is one of the most generalized 

 members of the sub-order and one of the most important as food 

 fishes. 



FIG. 86. Zanclus canescens, Linn. (Redrawn after Jordan and Evermann.) 



The Flounders or Flat-fishes (Pleuronectidce) are among the 

 most aberrant of all fishes (Fig. 87). So unique are they in their 

 peculiarities that Jordan sees fit to place them in a separate sub-order, 



FIG. 87. Pleuronectes cynoglossus (Flounder), from the right side, d.f, dorsal 

 fin; 1. e, left eye; r. e, right eye; pet. /, pectoral fin; pv. /, pelvic fin. (From Parker 

 and Haswell, after Cuvier.) 



