Shortly after my arrival in New Zealand my friend Professor G. B. Howes, LL.D., F.R.S., urged me to undertake the investigation of the development of the Tuatara (Sphenodon punctatus), but for various reasons I decided at that time not to do so. Some time afterwards, however, while examining the parietal eye in some embryo Australian skinks, I was struck -with the existence of an optic cup, apparently similar to that of the paired eyes. This seemed so startling that T resolved to attempt to obtain Tuatara embryos for the purpose primarily of studying the development of the parietal eye.
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Arthur Dendy (1899) studied this question.
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