PLATE XIII. 



Fig. 1. Recently hatched larval Turbot, Botkus maximus. June 28, 

 1895. W. C. M. 



2. Early post-larval ditto. July 4, 1895. W. C. M. 



3. Young Turbot, pelagic stage, with spines. C. J. Petersen. 



4. Young ditto, more advanced, with spines. C. J. Petersen. 



5. Young ditto, somewhat older (near bottom stage). A. T. M. 



6. Young ditto (bottom stage), 14 mm. long. A. T. M. 



7. Newly hatched hybrid between Turbot and Brill. E. E. Prince. 



8. Post-larval Brill, Bothus rhombus, surface. St Andrews Bay, 



July 11, 1890. W. C. M. 



9. Post-larval ditto, 9'5 mm. long. Moray Frith, June 28, 1889. 



W. C. M. 



10. Brill-like form, 10 mm. long. Off Aberdeen, June 23, 1893. 



Specimen was incomplete posteriorly. W. C. M. 



11. Young Brill, without spines, pelagic. C. J. Petersen. 



12. Young Brill, without spines, later. C. J. Petersen. 



