158 University of Washington Publications in Biology [Vol. 2. 



7a. An arched lateral line and accessory dorsal branch present; 

 dorsal rays 67 to 82; anal 51 to 62; vertebrae 38 to 41. 

 Range : Japan, Alaska to southern California. Marine. Abun- 

 dant. 

 Rock Sole. Flounder 138. Lcpidopsetta bilineata (Ayres) 



7b. Arch of lateral line absent, accessory dorsal branch present. 



8a. First 5 to 10 dorsal rays on blind side; body covered with 

 smooth scales, mostly cycloid ; scales not imbricated, scarcely 

 touching each other ; interorbital space narrow and very 

 high ; anal rays 46 to 56 ; dorsal rays 66 to 77. 



9a. Origin of dorsal fin on blind side on a level with the up- 

 per lip, the 1st 5 or 6 dorsal rays occur on the blind side ; 

 dorsal rays 65 to 78 ; anal 46 to 55 ; vertebrae 36 to 38. 

 Range: Alaska to San Diego. Marine. Common. 

 Sole. "C-O" Sole... 139. Plenronichthys coenosus Girard 



9b. Origin of dorsal on blind side on a level with the lower 

 lip, the 1st 9 rays occur on the blind side ; dorsal rays 68 

 to 79; anal 46 to 52; vertebrae 37 to 39. Range: Alaska 

 to Santa Barbara Islands. Marine. Common southward. 



Sole. Turbot 



140. Plcuronichthys decurrens Jordan and Gilbert 



8b. Origin of the dorsal fin either on the mid-line or slightly 

 on the eyed or blind side, not more than 1 or 2 of the 1st 

 few dorsal rays occur slightly on the blind side. 



10a. Scales smooth, mostly cycloid, closely imbricated, 

 about 94 to 104 along the lateral line ; upper eye situ- 

 ated on dorsal outline ; interorbital space narrow and 

 low ; dorsal rays 72 to 89 ; anal 54 to 70 ; vertebrae 42 

 to 44. Range : Alaska to San Diego. Marine. Common. 

 Sole. English Sole 141. Parophrys vetulus Girard 



10b. Scales rough ctenoid on one or both sides of the bod}'. 



11a. Dorsal rays 65 to 76; anal rays 50 to 61; scales 76 

 to 86. Range : Puget Sound. Marine. Rare. 



Bastard Sole. Hybrid Sole 



142. Inopsetta ischyra 8 (Jordan and Gilbert) 



lib. Dorsal rays 84 to 90; anal rays 63 to 68; scales about 

 87 to 90. Range : Puget Sound to Point Conception. 

 Marine. Common. 



Rock Sole. Scaly-finned Flounder 



143. Isopsctta isolcpis (Lockington) 



7c. Lateral line with neither an anterior arch over pectoral fin nor 

 an accessory dorsal branch. 



12a. Body covered with ordinary smooth fine scales, not 

 stellate; body elongate; scales about 130 to 145. 



13a. Pectoral fins very long, that of the eyed side 

 longer than length of head ; dorsal rays 87 to 

 110; anal rays 79 to 93; vertebrae 62 to 65; op- 

 ercular opening extending much above pectoral 



8 Schultz, L. P., and Smith, R. T., have found this to be a hybrid between Platichthys 

 and Parophrys. 



