Table 7 —Development of spines in the head region of Sedosteme/anops larvae and juveniles. + denotes spine present and 



spine absent. 



denotes 



Standard 

 length 

 (mm) Parietal 



10.6 

 11.7 

 11.9 

 11.9 

 12.4 

 12.8 

 12.8 

 12.8 

 13.5 

 13.6 

 13.9 

 14.0 

 14.9 

 15.4 

 15.4 

 15.7 

 15.9 

 16.4 

 16.5 

 17.2 

 17.4 

 17.4 

 17.7 

 17.7 

 18.5 

 19.0 

 19.2 

 19.2 

 20.7 

 20.7 

 21.0 

 22.9 

 223.2 

 224.0 

 224.0 

 224.6 

 227.9 

 230.6 

 *33 1 

 •339 

 •■352 

 ■•35.8 

 "38.2 

 "39.2 

 MOO 

 MI.O 

 M3,8 

 ■•453 

 "48,4 

 '52.5 

 '62,5 

 '67,0 

 '76,1 

 '89,4 

 '97,7 

 '100,9 

 '111,6 



Preopercular 



(anterior series) 



1 St 2d 3d 



Preopercular 

 (posterior series) 



Opercular 



5th Superior Inferior 



oper- 

 cular 



Sub- 

 oper- 



Pre- 

 ocular 



Supra- 

 ocular 



Post- 

 ocular 



(') 

 (') 

 (') 

 (') 



(') 



' ■*) 

 ") 

 ") 

 •') 

 ' ') 



") 

 ") 



(' ') (' ') 



+ 





V) 



(') 



(') 



CI 



'Bump, indicates beginning of spine formation or txiny overgrowth of spine 



^Transforming 



'Parietal and nuchal spines fused 



"Pelagic juvenile 



^Spine IS bifid 



^Spine covered by fleshy lobe 



'Benthic juvenile 



"Spine has become scale-covered 



^Adjacent spines fused 



the coast. Benthic juveniles have been taken in 

 estuaries, tidepools, and near the coast at depths 

 <20m. 



Parturition times reported for S. flavidus are 

 December to February off California (Phillips 



1958) and March off Oregon (Westrheim 1975). 

 Larvae 10-20 mm long were taken April through 

 June, although most were taken in April and 

 May. Larvae and pelagic juveniles 20-40 mm long 

 were taken April through July, indicating some 



920 



