J0URN1L ROYAL SOCIETY, N.S.W., 1888. pute». Ftetn. 



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Fig. 13. Dorsal eye of Onchidium ddmdii, showing entry of optic nerve, x 150 diam. 



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Fig. 14. Portion of Basilar membrane of dorsal eye Onchidium damdii, x 400 diam. 



