62 U.S. NATIONAL MUSEUM BULLETIN 2 02 Vol. .3 



5.6; least width of bony interorbital 8.6 to 9.3; postorbital length of 

 head 2.0 to 2.1; longest ray of pectoral 1.7 to 1.8, of pelvic 1.2 to 1.3, 

 and of spiny dorsal 2.1; all in length of head. Least width of bony 

 interorbital in lengthwise axis of eye diameter, 1.4 to 2.0, and in length 

 of snout 2.5 to 2.8. Snout 1.5 to 1.6 in postorbital length of head. 



Teeth vilHform, in bands on jaws and palatines, and in a patch on 

 each side of vomer; tongue edentulous, its tip concave anteriorly; lips 

 without papillae or fringe; cheek bicarinate; nostrils tubular, anterior 

 one with a short dermal cirrus; dorsal and ventral surfaces of head 

 naked, but some scales behind eye on preopercle and on opercle; inter- 

 orbital concave, no pit behind orbit ; opercular membrane without deep 

 notch; first 2 scales of lateral line bearing spines; no orbital tentacle; 

 front edge of preorbital with two forwardly directed spines; cranial 

 spines illustrated in figure 148; first dorsal spine connected by mem- 

 brane tp base of second spine and contained 4 to 5 times in second. 



Color in alcohol. — Background coloration pale or whitish, with 5 

 obscure slightly dusky crossbars on back; undersides white; dorsal 

 surfaces with scattered dusky flecks or specks; a brownish or dusky 

 band across orbits and cheeks, with its edges usually outlined by a 

 darker brown line; pectorals, pelvics, caudal, and dorsal fins lightly 

 barred with darkish pigment specks; lips barred. 



Order PLEURONECTIDA (=Heterosomata) 

 Suborder Psettodina 



KEY TO THE FAMILIES OF PLEURONECTIDA FROM THE NORTHERN MARSHALL 

 ISLANDS AND ADJACENT REGIONS 



la. Eyes on left side Bothidae (p. 62) 



16. Eyes on right side. 



2a. Preopercular margin free Pleuronectidae (p. 66) 



2b. Preopercular margin not free Soleidae (p. 68) 



Family BOTHIDAE 

 By Loren p. Woods 



KEY TO THE GENERA AND SPECIES OP BOTHIDAE FROM THE NORTHERN 

 MARSHALL ISLANDS AND ADJACENT REGIONS 



la. Scales in lengthwise series 76 to 97; interorbital width always greater than 

 diameter of eye; greatest depth of body 1.6 to 2.0 in standard 



length Genus Bothus 



2a. Dorsal fin rays 95 to 103; anal rays 75 to 81. 



Bothus mancus (Broussonet) 

 26. Dorsal fin rays 86 to 94; anal rays 65 to 72. 



Bothus pantherinus (Riippell) 

 16. Scales in lengthwise series 45 to 50; interorbital width always less than 

 diameter of the eye; greatest depth of body 2.2 to 2.4 in standard 

 length; dorsal fin rays 80; anal 63. 



Arnoglossus intermedius (Bleeker) 



