sitter: new ZEALAND POLYPLACOrHORA. 195 



? Chito7i (flaiiciis, Gray: 8pic. Zool., pt. i (1828), p. 5. 



Chitun glaums, Gray: Hutton, Man. New Zealand Moll., p. 112. 



? Lophyrus glauciis, Gray : Angas, Proc. Zool. iSoc, 1867, p. 222. 



Ilah. — Common everywhere. In tlie Soiith mostly uniformly dark 

 olive-green, sometimes brown. 



20. Chiton ^ereus (Reeve). 



Chiton asrem, Eeevc : Conch. Icon. (1847), t. vii, fig. 36. 



Chiton (^Leptochiton) areus, Reeve: Smith, Voy. " Erebns " and 



"Terror," Moll., p. 4., t. i, fig. 9. 

 Chiton (ereus, Reeve: Hutton, Man. New Zealand Moll., p. 112; 



Pilsbry, Man. Conch., ser. I, vol. xiv, p. 179, pi. xxxvi, 



figs. 9H-7. 

 Chiton stculoides, Carpenter MS. 



Carpenter's notes on the species, reproduced by Pilsbry, have enabled 

 me to separate it from the nearly allied Chiton Quoyi. In addition 

 to Carpenter's description I wish to point out that light-coloured 

 specimens of C. Quoyi show the same bluish colour of the interior 

 as C. cerens. Most of my specimens are covered with a blackish- 

 green coat. I found the divergence to be nearly 100°, against 120° in 

 C. Quoyi, and the jugum is not carinatod, but angled, nor is it always 

 smooth. In one specimen which I took to pieces, the anterior valve 

 has 8, the posterior 15 slits; C. Quoyi has 9-10 and 1;^-I4 slits 

 respectively. The shell is also narrower than that of C. Quoyi, the 

 proportion of breadth to length being 1 : 1'7 in C. areus and 1 : 1'5 

 in C. Quoyi. The denticulation of the sinus and the crenulation of the 

 teetli are the same in both. 



ITab. — The only locality in which I have hitherto found the species 

 is Manukan Harbour, North Island. I have not seen it in any of our 

 New Zealand collections. My specimens are smaller tlian the type. 



21. CnrroN pellis-serpentis (Quoy & Gaimard). 



Chiton peliis-serpentis, Quoy & Gaim. : Yoy. Astrolabe, Zool. vol. iii 

 (1835), p. 381, t. Ixxiv, figs. 17-22 ; Deshayes in Lamarck, 

 Anim. sans Vert., vol. vii, p. 508 ; Reeve, Conch. Icon., 

 t. XV, fig. 84 ; Hutton, Trans New Zealand Inst., vol. iv, 

 p. 176; Man. New Zealand Moll., p. Ill; Haddon, 

 " Challenger," Poly|)lacophora, p. 22 ; Pilsbry, Man. 

 Conch., ser. I, vol. xiv, p. 173, pi. xxxvii, figs. 14-18. 



The colour varies from white to brown. I found recently a young 

 specimen of a most beautiful bluish-green, with bands of the same 

 colour on the girdle. 



Hub. — This is the commonest of our New Zealand Chitons, 



