PISCES 



147 



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

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

 fishes. 



Fig. 86. — Zmichis cnnescens, Linn. (Redrawn after .Jordan and Evermann.) 



The Flounders oi- Flat-fishes (Pleuronedida) are among the 

 mo.st 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, 



/--V 



Fig. S7. — Pleuronecies cynoglossus (Flounder), from the right side, d.f, dor.sal 

 fin; I. e, left eye; r. e, right eye; pct.f, pectoral fin; pv.f, pelvic fin. (From Parker 

 and Haswell, after Cuvier.) 



