582 



Onithochiton (Chiton) imdulatus, Quoy et Gaimard. 

 Type (Zool. deTAstrol., p. 393, t. 75, f. 19-24, New Zealand). 

 The label is in the handwriting of Quoy or Gaimard, "PI. 75, 

 figs. 19-24, 1833." This corresponds with specimens in my 

 own collection from Doubtless Bay, New Zealand, except that 

 in the type the diagonal rib is almost smooth, showing little 

 granulation. The shells are bleached. 



Onithochiion astrolabei, Rochebrune. Type (Bull. Soc. 

 Philom., Paris, 1880-81, p. 120), New Zealand, Quoy et 

 Gaimard, 1829. This shell has spaced granules in the diagonal 

 rib similar to my Doubtless Bay specimens, and is only 

 a slight variation from the type of Quoy and Gaimard's 

 undtdatus. 



Onithochiton neglectus, Rochebrune. Type (Bull. 

 Philom., Paris, 1880-81, p. 120), Wellington, New Zealand, 

 Quoy et Gaimard. This is an exceptionally granulose shell, 

 probably a. variety of Quoy et Gaimard's nndNlati/s, but as 

 that name was preoccupied Iredale substituted the name 

 neglectus, E-ochebr. (Trans. N. Z'd. Inst., vol. xlvii., 1914). 



Onithochiton' lyeMi, Sow. Tliere is in spirit a rather 

 worn specimen from He Pitcairn. This seems conspecific with 

 0. quercinus, Gould. 



Gymnoplax adelaidensi^, Quoy et Gaimard, 1829. This 

 is an East Indian shell from Amboine. It has scales like a 

 Ha'plo'plax and resembles members of that genus in general 

 shape, but there the resemblance ends, the valves being very 

 strongly sculptured. I have no reference to its description. 



