CONTENTS 



Pag<! 



Common names 269 



Sampling 269 



Structural differences distinguishing the species 269 



Scales 270 



Gill rakers 272 



Anal rays 273 



Dorsal rays 274 



Correlation in the numbers of anal raj's and gill rakers 274 



Frequency polygons 276 



Color pattern 277 



Proport ional measurements 280 



Cliange of form with size 281 



Sijecimens at the border line 282 



Generic limits 284 



Key to the American species 285 



Hippoglossina 287 



Sul)genus Hippoglossina 288 



H . boUmani 288 



H. mystacium 289 



H. stomata 289 



H. macrops 291 



Subgenus Lioglossina 293 



H. oblonga^__ 293 



H. tetrophtliahnus- 297 



Pseiulorhombus 298 



P. isosceles 299 



Paralichthys 300 



Subgenus Paralichthys 301 



P. microps 30 1 



P. patagonicus 30 1 



P. hilgendorfii 304 



P. schmitti 305 



P. fernandezianus 305 



P. adspersus 306 



P. californicus 307 



P. aestuarius 310 



Subgenus Chaenopsetta 312 



P. woolmani 312 



P. brasiliensis 314 



P. dentatus 316 



P. albigutta 324 



P. vorax 327 



P. tropicus 327 



P. lethostigma 328 



P. squamilentus 332 



Species of doubtful relationship , 334 



Paralichthys triocellatus„ _ 334 



Paralichthys cocruleostiota - — 335 



Hippoglossus kingii ^ 335 



