99 
6ntisk lay ALL 
18. PuaxrpHoRA cosTata, Blain. 
Chiton costatus, Blain, Dict. Se.- Nat., xxxvi., p. 548;. 
Pilsbry, Man. Conch., vol. xv., p. 105. 
Plaziphora glauca, Quoy and Gaim.; Bednall, Proc. Mal. 
Soc., London, vol. ii., part 4, April, 1897. 
Chiton glaucus, Quoy and Gaim., Voy. Astrolabe, Zool. iii.,. 
p. 376. 
Plaxiphora glauca, Pilsbry, Man. Conch., ser. i., vol. xiv.,. 
p. 325. 
Plaxiphora costata, Iredale, Proc. Mal. Soc., London, vol. 
ix., part 2, June, 1910, p. 97. 
Mr. Iredale says: ‘“‘Blainville’s costatus is easily recog- 
nizable as the species I have noted as glauca, Q. et G.” He 
agrees with Dr. Thiele in his “Revision des Systems der 
Chitonen” in placing 1. petholata, Sow., as albida of Blain- 
ville and P. glauca, Q. et G., as costatus, Blain. 
Good specimens of /?. costata were found at Rottnest 
Island, Albany, and Bunbury, and valves were plentiful at 
Ellenbrook and Yallingup. 
I notice that Blainville took P. costata, or, as he named 
it, Chiton costatus, from the ‘‘Port of King George.’’ Wes- 
tern Australia, therefore, is the first locality where the 
shell was found. Quoy and Gaimard found it in d’Entre- 
casteaux Channel, Tasmania. 
ALIA r 
oe areas ee Smith, 1884. FST s 
Chiton (Acanthochiton) asbestoides (Carpenter, MS.), Smith, 
Zool. Coll., H.M.S. ‘Alert,’ p. 833; Bier os Man. Conch., 
ser, i., vol. xv., p. 17. 
Acanthochites asbestoides, Carpenter; Pilsbry, Proc. Acad. 
Nat. Sec., Philad., 1894. 
Two specimens taken at Albany. 
, 
= Sighp 
/ 
NVotafCAw 
20. KeANTHOGHETES speciosus, H. Adams, 1861. -S2ZG 
Oryptoplax (noloplar) speciosus, H. Adams, Proc. Zool. Soc., 
1861, p. 385. 
Acanthochites speciosus, H. Adams, Pilsbry, Man. Coneh., 
Ser, 1., vol. xv., p. 32. 
One specimen of this rare shell was found at Rabbit 
Island, near Albany. 
21. AcANTHOCHITES vERCOoNIS, Torr and Ashby, 1898. F836 
Acanthochites Verconis, Torr and Ashby, Trans. Roy. Soc. 
S.A., 1898, p. 217. 3 7 
One specimen dredged from 20 fathoms at Geographe 
Bay. Mr. Hedley, conchologist, of Sydney, is unable to- 
separate A. Verconis from A. Wilsoni, of Sykes, Proc. Mal. 
Soc., London, yol. ii., part 2, July, 1896. 
nz 
