BY CAPTAIN F. W. HUTT0N, F.G.S. 515 



and the " Conchologia Iconica." The sculpture of the right valve 

 is rather coarser than that of the other valve. (E. A. Smith, 

 Proc. Zool. Soc, 1880, p. 580. 



Myodora rotundat^. Sowerby, Pro. Zool. Soc, 1875, p. 129, 

 pi. 24, fig. 8. 



Habitat. — New Zealand. (British Museum). 



I have seen no specimens. 



This species differs from the last in having the right valve much 

 deeper, the hinder dorsal margin proportionally shorter, less 

 incurved and more sloping, the ligamental pit much smaller, and 

 the contour of the shell more round (Smith, 1. c, p. 580). 



Myodora brevis. Sowerby, Appendix to Stutchbury's Sale 

 Catalogue, p. 3, plate, fig. 2 ; Reeve, Conch. Icon., fig. 7 ; 

 Chem. Man. de. Conch., II., p. 52, fig. 217 [not of Woodward, 

 nor of Adams]. M. plana, Hutton, Man of New Zealand 

 Mollusca, (1880), p. 137 [not of Sowb]. 



Habitat. — Stewart's Island. 



Found also in Australia and Tasmania. 



Variable in shape. The microscopic sculpture consists of a very 

 minute granulation, the granules being of unecpxal sizes, and 

 frequently transversely oblong. This granulation is coarser than 

 in other species of the genus ; and the almost total absence of the 

 radiating lines obtaining in all of them is remarkable (Smith, 1. c, 

 p. 580). 



Myodora pandoriformis. Stutchbury, Zool. Jour., V., p. 99 ; 

 tab. Supp., 43, figs. 3-4 ; Reeve, Conch. Icon., fig. 10. M. 

 brevis, Adams, Gen. Moll., III., pi. 98, fig. 2 [not of Sowb] 



Habitat. — Stewart's Island. (C. Traill). 



I have not seen this species. It is also found in Australia. 



Easily recognised by its transversely elongate form ; its 

 comparative smoothness, and the excessive fineness of the micro- 

 scopic sculpture (Smith, 1. c, p. 581.) 



