[5] FLOUNDERS AND SOLES. 229 
Parophrys. 
| Inopsetta. ° 
Lepidopseita. 
| LTimanda. 
PLATESSA { Pseudopleuronectes. 
| Platessa. 
Flesus. 
Liopsetta. 
Platichthys. 
_ MicrosTomvs. 
CYNICOGLOSSUS. 
IV.—ONCOPTERIN 2. 
ONCOPTERUS. 
V.—SOLEIN#. 
Apionichthys. 
APIONICHTHYS ; Achiropiis. 
GYMNACHIRUS. 
Achirus. 
Baiostoma. 
Monochirus. 
Moxocues} Microchirug. 
Quenselia. 
ACHIRUS } 
SOLFA. 
BRACHIRUS. 
V1I.—CYNOGLOSSIN#. 
¢ Symphurus. 
Bascanius. | 
Delothyris. 
Charybdia. 
Bibronia. 
Acedia. 
SYMPHURUS¢ Larval forms. 
Sa 
ANALYSIS OF SUBFAMILIES OF PLEURONECTID. 
a. Flounders: Edge of preopercle free ; mouth with developed teeth ; pectoral and 
ventrals well developed (one pectoral* or one ventral occasionally absent). 
b. Mouth nearly symmetrical, the dentition nearly equally developed on both sides, 
the gape usually, but not always, wide. 
c. Ventral fins symmetrical, similar in position and in form of base, the ventral 
fin of the eyed side not being extended along the ridge of the abdomen. 
HipPoGLossin # I, 
ec. Ventral fins unsymmetrical, dissimilar in position and usually aiso in form, 
the ventral fin of the eyed side being extended along the ridge of the ab- 
domen. Eyes and color on the left side -..........-- PLEURONECTIN & II.t 

*Both pectorals are wanting in the genus Mancopsetta Gill (= Lepidopsetta Gthr.), 
an antarctic member of the Plewronectine. 
tIn the Samarine, the eyes and color are on the right side, the mouth is small bue 
nearly symmetrical, the ventral fins are both lateral but with, base somewhat pro- 
longed, the gill-rakers are minute, and in most of the species some of the dorsal rays 
are filamentous and simple, resembling spines. The group, like the Onc opterine, seems 
to lie between Pleuronectine and Platessine. It seems to include the genera Samaris, 
Lophonectes, Pacilopsetta, and Nematops, all belonging to t he Indo-Pacific fauna. 
