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



22b. Dorsal series of scales ending 1 to 3 rays 

 before end of soft dorsal and never meeting 

 its fellow behind ; the lower edge of the pre- 

 opercle with 3 well developed spines ; the low- 

 er strong one directed downward and curved 

 forward; the middle one pointing backward 

 and downward ; the upper one directed back- 

 ward ; nasal spines short and obscure ; nasal 

 tentacles obsolete. Range : Alaska to Santa 

 Barbara Islands. Marine. Rare. 



236. Icelinus burchami Evermann and 



Goldsborough 



19b. Lateral line with scales unarmed ; body robust ; 

 no filamentous spines ; top of head scaly ; preop- 

 ercular spines 3 or fewer (that is, 1 small one 

 in addition to the bifid tip) ; outer margin of 

 preopercle with 1 blunt spine or only small prom- 

 inences covered by skin. 



23a. Dorsal band of scales meeting its fellow be- 

 yond the dorsal fin; 31 to 35 oblique rows in 

 the longitudinal series along base of fin ; a 

 small pore behind 4th gill arch ; pectoral rays 

 IS or 16. Range: Unalaska to San Francisco 

 Bay. Marine. Common northward. 

 237. Astrolytes fenestrates (Jordan and Gilbert) 



23b. Dorsal band of scales not meeting its fellow 

 posteriorly, not extending beyond dorsal fin; 

 no pore behind the 4th gill ; pectoral rays 16. 

 Range : Str. of Juan de Fuca southward to 

 southern California. Marine. Rare northward. 

 238. Parastrolytes notospilotus (Girard) 



17b. Preopercular spine bifid or simple, without the extra 

 hooks or antler-like processes above the bifid or 

 simple spine at tip of preopercle. 



24a. Back with a distinct band of scales on each side 

 above the lateral line ; the interorbital space flat or 

 concave. 



25a. Top of head depressed; lateral profile somewhat 

 pointed anteriorly ; scales in 26 to 29 oblique se- 

 ries along base of dorsal but not meeting behind 

 dorsal fin. Range : British Columbia to Pt. Con- 

 ception, California. Marine. Common. 

 239. Artcdius lateralis (Girard) 



25b. Top of head not depressed ; lateral profile 

 bluntish; scales in 31 to 60 oblique series at base 

 of dorsal. 



26a. Scales in 31 to 35 oblique rows in the longi- 

 tudinal series of scales along the base of dor- 

 sal fin ; ventral side of chin unmarked. Range : 

 Unalaska to San Francisco Bay. Marine. 

 Common southward. 

 237. Astrolytes fenestralis (Jordan and Gilbert) 



