156 PROCEEDINGS OF THE MALA.COLOGICAL SOCIETY. 



by mc to Mr. Pilsbiy, who attaclied the following note: "Differs 

 from Port Jackson types iu colouring somewhat, but is the same 

 thing in sculpture practically." 



Hab. — Two examples were obtained in company with A. asbestoides 

 and A. Bednalli, Pils., at Sultana Bay, Yorke Peninsula. Since 

 obtained plentifully at Hardwicke Bay, Spencer Grulf. The type- 

 specimens were collected at Port Jackson and Port Hacking, New 

 South Wales, by Dr. J. C. Cox. 



34. ACANTHOCHITES SPECIOSUS (H. Ad.). 



Cryptoplax [Notoplax) speciosus, H. Adams: Proc. Zool. Soc. 1861, 



p. 385. 

 Acanthochites speciosus, H. Ad. : Pilsbry, Man. Conch., ser. I, vol. xv, 



p. 32, pi. i, figs. 23-6. 

 Acantliochites {Notoplax) speciosus, H. Ad. : Pilsbry, Proc. Acad. Nat. 



Sci. Philad. 1894, p. 83, pi. iv, figs. 31-3. 



This species is scarce in collections, because seldom taken whilst 

 shore gathering. 



Hah. — St. Vincent's Gulf, fine specimens dredged alive by Dr. J. C. 

 Yerco, attached to sponges, etc. ; Southern Yorke Peninsula, amongst 

 rocks ; also Pliuders Island, Bass Straits ; Tasmania. 



35. Acanthochites (Notoplax) Matthewsi, Betln. & Pilsbry. 



Acanthochites Matthewsi, Beduall & Pilsbry: Nautilus, vol. vii (1894), 

 p. 120; {Mtoplax?) Pilsbiy, Proc. Acad. Nat. Sci. 

 Philad. 1894, p. 83, pi. iv, figs. 27-30. 



A very beautiful and unique Chiton, sent me some four or five 

 years ago by Mr. Matthews, who took it during an extremely low tide 

 in Sultana Bay, Yorke Peninsula. I sent it to Mr. Pilsbry, who 

 pronounced it to be new, with sculpture " extremely peculiar, and 

 different from that of any previously known member of the family 

 Acanthochitida3." Length 26, breadth 8 mm. (a di'ied specimen). 



36. Acanthochites (Loboplax) vakiabilis (Ad. & Angas). 



Hanleya variahilis. Ad. & Aug.: Proc. Zool. Soc. 1864, p. 194; 



Pilsbry, Man. Conch., ser. I, vol. xv, p. 101. 

 Acanthochites {Kotoplax'^) t'«rm5//?s, Pilsbry : Proc. Acad. Nat. Sci. 



Philad. 1894, p. 84. 



A small oblong shell, the whole surface of which is ornamented 

 with small pustules. Mr. Pilsbry, in 1893, placed it amongst 

 "Insufficiently described Chitons" (Appendix II, vol. xv, of the 

 " Manual of Conchology ") ; but in the following year, in his " Eeview 

 of Australian Acanthochitidse " (Proc. Acad. Nat. Sci. Philadelphia), 

 included it as a probable Notoplax. I collected one specimen at Rapid 

 Bay, and a second at Kangaroo Island. Visiting Mr. E. H. Matthews 

 on Yorke Peninsula, I took them with me, and on looking through his 

 material found several others, whilst our first excursion resulted in the 

 captui'e of many more specimens. At my request, Mr. Matthews has 



