1936] Schults: Keys to Fishes 163 



Family 60. Moronidae. Sea Bass 



Range : Introduced on Pacific Coast ; northern Oregon to southern Cali- 

 fornia. Marine and Freshwater. Common. 

 Striped Bass 175. Rocctts saxatilis (Walbaum) 



Family 61. Otolithidae 



Range : Coast of California, occasionally taken as a visitor as far north as 

 southeastern Alaska. Marine. Rare northward. 

 White Sea Bass 176. Atractoscion nobilis ( Ayres) 



Family 62. Trichodontidae 



Range : Kamchatka to Oregon. Marine. Common northward. 



Sand Fish 177. Trichodon trichodon (Tilesius) 



Family 63. Scorpaenidae. 9 Rockfish 



la. Dorsal spines XIV to XVII; top of head scaly; vertebrae 29; palatine 

 teeth present ; anal III, 5 ; pectorals with lower rays broadened or pro- 

 longed into linguiform lobe. 



2a. Dorsal spines XV to XVII (usually XVI) gill rakers 18 to 22 on 1st gill 

 arch ; longest spines of dorsal, the 4th or 5th are contained 2.9 to 3.5 in 

 head ; light vertical lines or rows of spots across the dark pectoral 

 blotch ; branchiostegals naked. Range : Alaska to California. Marine. 

 Not common. 



Spiny-headed Rockfish. Lobe-finned Rockfish 



178. Sebastolobus alascanus Bean 



2b. Dorsal XIV to XVI (usually XV) ; gill rakers 21 to 24 on 1st gill 

 arch; longest spine of dorsal, the 3rd, is contained 1.7 to 3.0 in head; no 

 light vertical rows or lines of spots across the dark pectoral blotch; 

 branchiostegals scaly. Range : Aleutian Islands to San Diego in deep 

 water. Marine. Not common. 



Spiny-headed Rockfish. Lobe-finned Rockfish 



179. Sebastolobus altivelis Gilbert 



lb. Dorsal spines XIII (very rarely XIV) ; vertebrae 27; palatine teeth pres- 

 ent. 



3a. Interorbital space more or less convex (never concave), broad, less 

 than 3 l /2 in base of skull ; cranial ridges very low or obsolete, the 

 spines when present, delicate ; base of skull strongly curved, meseth- 

 moid processes not elevated (not directed upward), ventral process 

 of basisphenoid rudimentary (or fairly developed only in young) ; 

 anal rays III, 6 to 9 ; gill rakers usually long and slender ; snout, pre- 

 orbitals and jaws more or less scaly. 



4a. Cranial ridges (except parietal) all obsolete or very slightly de- 

 veloped, cranial spines absent or very inconstant and minute (regu- 

 larly present only in young; preocular spines usually present in 

 mystinus) ; lower jaw much projecting. 



5a. Parietal bones not meeting; mesethmoid processes weak and de- 

 pressed ; scales small, in 90 to 100 transverse series above lateral 

 line, 65 to 80 tubes; lower jaw much projecting, entering profile, 



"Modified after Jordan and Evermann, Bull. 47, U.S.N.M. 1896-1900, and after Hubbs 

 and Schultz, Univ. Wash. Pub. Biol. 1932. 



