On the Presence of Eyes in the Shells of the Cliitouid£e. 141 



" 9. They also travelled far into the interior of this island 

 to obtain flint for the manufacture of their primitive stone 

 implements. 



" 10. They did not possess implements of nephrite (green- 

 stone) ^■. 



" 11. The polishing process of stone implements is of con- 

 siderable age in New Zealand, as more finished tools have 

 been found in such positions that their great antiquity cannot 

 be doubted, and which is an additional proof of the long ex- 

 tinction of the Moas." 



Thus Dr. Haast here appears to be absolute in every thing, 

 and it is with an appearance of absolute certainty that he asserts 

 or denies facts. But we shall see that he has himself been 

 obliged to go back over some of these propositions and to 

 recognize that some of them are not well founded. Never- 

 theless the general convictions of the learned geologist have 

 not been shaken on this account, and we shall have to inquire 

 whether this persistence is justified. 



[To be continued.] 



XIX. — On the Presence of Eyes and other Sense- Organs in the 

 Shells of the Chitonida^. By H. N. Moseley, M.A., 

 F.R.S., Linacre Professor of Human and Comparative 

 Anatomy in the University of Oxford. 



On examining a specimen of Schizochtton incisus, preserved 

 in spirit amongst a lutmber of other animals dredged by 

 Captain W. Chimmo, R.N., in the Sulu Sea, in H.M.S. 

 'Nassau' in 1871, and by him presented to the Anatomical 

 Department of the Oxford University Museum, I was asto- 

 nished to remark on the shells certain minute, highly refracting, 

 rounded bodies arranged in rows symmetrically ; they struck 

 me at once as resembling eyes, and further examination proved 

 that such is really their nature. On searching for eyes on the 

 shells of other Chitonidaj I found them present in the majority 

 of the genera, differing, however, in each genus more or less 

 in structure and arrangement. 



The eyes in the Chitonida3 are entirely restricted to the 

 outer surface of the shells on their exposed areas (tegmentum), 

 not extending at all on to the laminas of insertion (articula- 



* It is with this stone, often called jade, that the Maoris fabricated 

 their stone clubs, haches, and various ornaments. It was of great value 

 in their eyes, and often plays a part in their legends. Upon this point I 

 have given some details, borrowed from Sir George Grey, in a book en- 

 titled ' Les Polynesiens et leurs migrations.' 



Anil. & Mag. N. Hist. Scr, 5. Vol, xiv. 11 



