139 



THE POLYPLACOPHORA OF SOUTH AUSTRALIA. 

 By ^Y. T. Bednall. 



Bead ISth November, 1896. 

 PLATE XII. 



The late Mi*. G. F. Angas contributetl a paper to the Proceedings 

 of the Zoological Society of London in Jannary, 1865, on "The 

 Marine MoUuscan Fauna of South Australia," with a list of all the 

 known species iip to that time. The list included the following 

 representatives of the Chitonidaj : — 



Lophjrus nmricatus, A. Ad. Chcetopleura conspersa, H. Ad. & 



Loplnjrus tulipa, Quoy & Gaira. Angas. 



Lepidopleurus longicymba, Quoy & Lorica Angasi, H. Ad. & Angas. 



Gaim. Plaxipliora ciliata, Shy. 



Lepidopleuru& variegatus, H. Ad. & Plaxiphora petholata, Shy. 



Angas. Stenochiton juloides, H. Ad. & 

 Lepidopleurus speciosus, H. Ad. & Angas. 



Angas. Hanleya variabilis, H. Ad. & Angas. 



Lepidopleurus liratus, H. Ad. & An- Acanthochites scutiger , Ad. & Reeve. 



gas [=Z.«?5'?«M«^Ms (Reeve)]. Chitonellus Gunnii, Reeve. 



A few years later I was able to add to this list, Callistochiton antiquus. 

 Reeve, and Lorica volvox, Reeve (included in "A List of Species of 

 Marine Mollusca found on the Coasts of the Province of South 

 Australia," privately printed by me in 1875). A third species, 

 formerly identified as Chiton siculoides, Carpenter, but now decided 

 by Mr. Pilsbry to he new; and a fourth, referred to Chiton con- 

 centricus, Reeve, but which now proves to be Mr. Pilsbry's Chiton Coxi, 

 ai'e here added. 



In 1893 Mr. D. J. Adcock published " A Hand List of the Aquatic 

 Mollusca inhabiting South Australia," which contained all the above 

 enumerated species, with the following additional ones : Chiton Adelai- 

 detisis, Reeve, Chiton concentricus, Reeve, Acanthochites Zelandicus, 

 Quoy & Gaim., and Cryptoplax Burrowi, Smith. 



The foregoing comprise all the species of Polyi^lacophora recognized 

 up to within the last two years as living in our waters. As a group 

 the Chitons have always gi'eatly interested me, and it has been a 

 long-cherished desire on my part to be able to satisfactorily identify 

 the South Australian forms, especially those described by Adams and 

 Angas. I was, however, able to make but little progress, partly owing 

 to the fact that the literature at my command was limited, and partly 

 because the shells had been overlooked in collecting. It was not 



