1082 APPENDIX. 



To those who have not access to Thiele's " System der Chitonen " 

 in " Zoologica " it may be of interest to have a synopsis of it as far 

 as New Zealand genera are concerned. 



ORDO PLACOPHORA. 

 I. Subordo LEPIDOPLEURINA. 



Genus Lepidopleurus, Risso. 

 II. Subordo CHITONINA. 



1. Familia CALLOCHITONID^:. 



6. Subfamilia CALLOCHITONIN.E. 

 Genus Callochiton, Gray. 

 Genus Eudoxochiton, Shuttleworth. 



2. Familia MOPALIID^E. 



Genus Mopalia, Gray. 

 Genus Plaxiphora, Gray. 

 Genus Fremblya, H. Adams. 



3. Familia CRYPTOPLACID^. 



a. Subfamilia ACANTHOCHITIISLE. 



Genus Cryptoconchus, Blainville. 



Subgen. Spongiochiton, Cpr. ( = Loboplax). 

 Genus Acanthochites, Risso. 



4. Familia ISCHNOCHITONID^:. 



b. Subfamilia ISCHNOCHITONIN.E. 



Genus Ischnochiton, Gray. 

 Genus Callistochiton, Cpr. 



Subgenus Lorica, H. and A. Adams. 



5. Familia CHITONID^;. 



a. Subfamilia CHITONINA. 



Genus Chiton, Linne. 



b. Subfamilia ACANTHOPLEURIN^E. 



Genus Acanthopleura, Guilding. 

 Genus Tonicia, Gray. 



Subgenus Onithochiton, Gray. 



Cirsonella ? neozelanica, Murdoch, 1899. 



In a very interesting paper, " Ueber einige Realiiden," in Archiv 

 fur Naturgeschichte, 75 Jahrg., vol. i, Heft 3, 1909, 387-90, Dr. Joh. 

 Thiele states that, based on the radula, the genus Omphalotropis 

 cannot be retained in the family Realiidce, but has to be classed in 

 the family Pomatiasidce,. subfamily Omphalotropidince. 



The above-named species of Murdoch is shown to possess all the 

 characters of the Omphalotropidince, and Thiele is of opinion that 

 it may be nearest to some species of Acmella, Blanford, 1869, and he 

 proposes to name it Acmella neozelanica, Murdoch. 



The habitat of the species is interesting around the m.-ir^iii of a. 

 brackish pool. 



