154 Gatliff and Gabriel: 



Genus Stenochiton, Adams and Angas 1864. 



Stenochiton cymodocealis, Ashby. 



1918. Stenochiton cymodocealis, Ashby. T.R.S., S.A., 

 V. XLIL, p. 70, pi. 13-14, f. 1, 4, 5, 11, 12. 

 i/a^.— Portland. 



Obs. — Size of type: Length 10, breadth 3.5 mm.; found on 

 the seaweed Cymodocea antarctica. 



Genus Ischnochiton, Gray 1847. 



IscHNOCHiTON DEcussATus, Reeve. 



1847. Chiton decussatus, Rve. Conch. Icon., sp. 107, pi. 

 18, f . 107, also pi. of " Details of sculpture," 

 f. 107. 

 Hab. — Portland. 



Obs. — Dr. Torr has erroneously placed this species as a syno- 

 nym of Chiton siilcatus, Q. and G. They differ distinctly. Quoy 

 and Gaimard's name is not available, as in 1815, in General 

 Conchology, p. 16, pi. 3, f. 1, Wood described and figured a 

 different shell under that name, and it is quoted by Dillwyn in his 

 Cat. Recent Shells, p. 8. 



Ischnochiton iredalei, Dupuis. 



1917. Ischnochiton lineolatiis, Iredale and May; not of 



Blainville, Gat. and Gab., these Proc, v. XXX., 

 p. 26. 



1918. Ischnochiton iredalei, Dup. Bull. Mus. Hist., Nat., 



No. 7. 

 1921. Ischnochiton iredalei, Dup. Ashby, these Proc, 



V. XXXIII., for 1920, p. 151. 

 1921. Ischnochiton iredalei, Dup. Ashby, T.R.S., S.A., v. 



XLIV., for 1920, p. 284. 

 Obs. — This is /. contractus, auct. not of Reeve. 



Genus Plaxiphora, Gray 1847. 

 Plaxiphora bednalli, Thiele. 



1909. Plaxiphora glauca, Quoy and Gaim. Gat. and 



Gab., these Proc, v. XXII., p. 42. 

 1909. Plaxiphora bednalli, Thiele. Revision des Sys- 

 tems des Chitonen, p. 25, pi. 3, f. 27-31. 



