1130 . 
Analysis of Fami lies 
Dorsal not extending foirward on head, front rays spinous; oyes on 
right or left side; each ventral with spine and 6 soft rays. 
Psettodidae, 
Dorsal extending forward on head at least until over eye, none of rays 
spinous* ventral without spine* 
Preopercle edge free; lower jaw usually prominent, 
cl Eyes on left side (except in reversed specimens). Botkidae, 
c. Eyes on right side (except in reversed specimens). Pl*uronectidae 
Preopercle edge not free, hidden by skin and scales of head; lower jew 
never prominent# 
dj Eyes on right side, Soleidae. 
d§ Eyes on left side. 
Cynoglossidae 
