ON THE GENUS FLOUNDER. 517 



No. V, 



OBSERVATIONS ON THE GENUS PLEURONECTES, 

 BY EDWARD HANMER, ESQ. P. 326. 



GENUS. PLEURONECTES. FLOUNDER. 



Body compressed and expanded. 



Eyes, both on the upper side of the head. 



Synopsis of English species. 

 With the eyes towards the right. 







Proportional 





Page 



Breadth.* 





Plaise 



304 



- 48 



Head tuberculated. 



Dab 



308 



- 46 



Scales rough. 



Smear dab 



309 



- 46 



Scales smooth. 



Common 



305 



- 42 



Spines on the margin of the 

 body. 



Holibut 



302 



- - 39 



Without spines, tail lunated. 



Sole 



311 



- 37 



Side line near the head much 

 bent. 



Red back 



313 



- 36 



Side line straight. 



* Proportional breadth is the proportion the breadth 

 bears to the length ; the latter always supposed to consist of one 

 hundred parts. Length means the distance, as traced by a 

 string, on the lower side the fish from the point of the head to 

 the setting on of the tail. Breadth is the greatest distance 

 between the dorsal and anal fins, ascertained in the same man- 

 ner, and on the same side of the fish. 



