1303. 
Analysis of Genera 
ai Pleuronectinae. Mouth small or large, symmetrical; fin rays not extended, 
b l Eyes and color on right side. 
cJ Gill membranes united, 
di Mouth small, 
el Each eye with a tentacle. 
;ops. 
e." Eyes without tentacles. 
, 2 
llopsetta. 
Mouth large. 
fl Scales firm, cover upper surfaces of eyes, Jaws and snout. 
.eDiaooiepnaron. 
f* 4 " Scales deciduous, not covering surface of eyes, jaws or snout; 
vomer toothed* 
c#~ Gill membranes separate* 
b * " Eyes and color on left side* 
Brachypleura* 
Paralichthodes. 
.euro 
z 
a* Samarinae * Mouth symmetrical* with jaws and dentition nearly equally 
developed on both sides; front dorsal rays greatly prolonged* 
gi Dorsal and right ventral with extended rays; caudal rays simple. 
Sarrmri^s e 
2 
§>~ Dorsal and right ventral rays not greatly extended; caudal rays 
branched* 
Samariscus 
Rhombosoleinae * Mouth usually asymmetrical* dentition always more 
developed on blind side; front dorsal rays not greatly prolonged* 
hi Two ventral fins* 
ii Right ventral free from anal* rays 10 or 11; lateral line with 
slight curve anteriorly* 
Asygopus 
