FISHERY BULLETIN: VOL. 77. NO. 4 



year and along the entire Oregon coast, but were 

 concentrated along an east-west transect off New- 

 port, Oreg. (lat. 44°39.1' N). All specimens were 

 preserved in 5 or lOVc Formalin^ and transferred 

 to —40% isopropyl alcohol. 



Our approach to identification, methods of mak- 

 ing counts and measurements, and terminology 

 for development and spination follow Richardson 

 and Laroche ( 1979). Body parts measured include: 



Standard length (SL) = snout tip to notochord 

 tip preceding development of caudal fin, then to 

 posterior margin of hypural plate. 



Snout to anus length = distance along body mid- 

 line from snout tip to vertical through posterior 

 margin of hindgut at anus. 



Head length (HL) = snout tip to cleithrum until 

 no longer visible, then to posteriormost margin of 

 opercle. 



Snout length = snout tip to anterior margin of 

 orbit of left eye. 



Upper jaw length = snout tip to posterior mar- 

 gin of maxillary. 



Eye diameter = greatest diameter of left orbit. 



Interorbital distance = distance between dorsal 

 margins of orbits. 



Body depth at pectoral fin base = vertical dis- 

 tance from dorsal to ventral body margin at base of 

 pectoral fin. 



Body depth at anus = vertical distance from 

 dorsal to ventral body margin immediately poste- 

 rior to anus. 



Caudal peduncle depth = shortest vertical dis- 

 tance between dorsal and ventral margins of 

 caudal peduncle. 



Caudal peduncle length = horizontal distance 

 from base of posteriormost dorsal ray to posterior 

 margin of hypural elements. 



Pectoral fin length = distance from base to tip of 

 longest ray. 



Pectoral fin base depth = width of base of pec- 

 toral fin. 



Pelvic spine length = distance from base to tip of 

 pelvic spine. 



Pelvic fin length = distance from base to tip of 

 longest ray. 



Snout to origin of pelvic fin = distance along 

 body midline to vertical through insertion of pel- 

 vic fin. 



'Reference to trade names does not imply endorsement by the 

 National Marine Fisheries Service. NOAA 



Parietal spine length = distance along posterior 

 margin of parietal spine from insertion to tip. 



Nuchal spine length = distance along posterior 

 margin of nuchal spine from insertion to tip. 



Preopercular spine length (third spine; posteri- 

 or series) = distance from tip to basal insertion if 

 visible, or to a line connecting the points of deepest 

 indentation between preopercular spines 2 and 3 

 and spines 3 and 4 (posterior series). 



Length of angle gill raker = distance from tip of 

 gill raker to point of articulation with gill arch. 



Longest dorsal fin spine = distance from base to 

 tip. 



Longest dorsal fin ray = distance from base to 

 tip. 



Longest anal fin spine = distance from base to 

 tip. 



All body lengths given refer to standard length 

 unless noted otherwise. 



When the two posteriormost dorsal and anal fin 

 rays arise from the same pterygiophore, they are 

 counted as one. 



A modified descriptive approach is used to 

 minimize repetition which would result due to the 

 extreme similarity in the development of S. flav- 

 idus and S. melanops. Descriptions are combined 

 for both species and differences are noted as they 

 occur. Reference to tabularized development mor- 

 phology data, including relative body proportions 

 and fin and head spine development, is made 

 wherever practical to condense the description. 



SEBASTES FLAVIDUS (AYRES) AND 

 SEBASTES MELANOPS GIRARD 



(Figures 1-6) 



Literature. — Pigment patterns of preextrusion 

 larvae of S. flavidus were described by Delacy et 

 al. (1964), including a figure, Westrheim (1975), 

 and Moser et al. (1977). Preextrusion larvae 

 (mean total length = 4.5 mm) have a row of usu- 

 ally <16 melanophores (x = 10, range 8-12 on 20 

 specimens) along the ventral body midline which 

 stops short of the anus by at least four myomeres. 

 The gut is pigmented and melanophore(s) are usu- 

 ally present on the ventral body surface near the 

 notochord tip. 



Larvae and juveniles of S. melanops have not 

 been described. 



Identification (Tables 1-3; Appendix Table 1). — 

 Fifty-one specimens of S./Zaufdus (10. 1-105.0 mm i 



902 



