SUTER : REVISION OF THE NEW ZEALAND POLYPLACOPHORA. 7 1 



Onithoehiton semiseulptus, lilibiy. 

 Man. Conch., (i) 1893, vol. xiv, p. 247, pi. Iv, figs. 10— i i. 



Some years back Mr. H. B. Kirk (now professor of liiology) after his 

 return from the Chatham Ishnds showed me two Chitons belonging to the 

 genus Onifhochiton, and I was sure I had not seen the species before Mr. 

 Kirk very kindly presented them to me, and I found that they represented 

 the above species, whose habitat was unknown to Dr. I'ilsbry. I sent him 

 one specimen for comparison with the t}'pe, and I was kindly informed that 

 my determination was correct. 



One specimen is now in the Canterbury Museum^ Christchurch, the 

 other in my collection. 



EXPLANATION OF PLATE IX. 



Figs. I — 3. Callocliiton ciiiplciiriis, Hiitton. Valves enlarged. 



Fig. 4. „ ,, „ Giidie scales, x 60, 



5. Isclniocliiton fiili'iis, Suter. Sliell nat. size. 



Figs. 6—9. ,, ,, ,, Valves enlarged. 



P^ig. 10. „ „ ,. Girdle scales, x 60. 



,, II. Pliixiphora vuinioclii, ^uitr. Shell enlarged. K. Murdoch del. 



„ 12. - Acaiitliocliites riihi^iiiosiis, Hullon. Shell nat. size. 

 Figs. 13—16. ,, ,, ,, Valves enlarged. 



Fig 17. „ ,, „ Part of girdle, magnified. 



