DAVIES ET AL.: OTOLITH ULTRASTRUCTURE OF SMOOTH AND BLACK OREO 



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Figure 4i. —Variation of increment widths (arrowed) in the otolith cross-section. Magnification = 160 x. 



j.— Cellulose-acetate peel showing the intermittency of fine increment sequences (arrowed), often obscured by a coarse underly- 

 ing crystallinity. Magnification = 1 60 x . 



511 



