160 



A. (Notoplax) speciosus, H. Adams: Pilsbry, Proc. Acad. 

 Nat. Sci., Philad., 1894, p. 83, pi. iv., figs. 31-33. 



This very hairy chiton, with a girdle, when alive, four 

 or five times wider than the tegmentum, is rare. I have 

 specimens from Aldinga, Marino, Stansbury, and St. Francis 

 Island. Dr. Verco dredged some very large specimens in Gulf 

 St. Vincent. I have one specimen from Stansbury with 

 three very distinct horny riblets on the anterior valve. This 

 may be a monstrosity or a new variety of speciosus. I found 

 one specimen at Albany, Western Australia, in which the 

 riblets in the interior valve are distinct but nodulose. Mr. 

 Maughan found a fine specimen washed ashore at Aldinga. 



45. Acanthochites (Notoplax) matthewsi, Bednall 

 and Pilsbry, 1894. 



Acanthochites matthewsi, Bednall and Pilsbry: Nautilus, 

 vol. vii., 1894, p. 120; (Notoplax?) Pilsbry, Proc. Acad. Nat. 

 Sci., Philad., 1894, p. 83, pi. iv., figs. 27-30; Bednall, Proc. Mai. 

 Soc, London, vol. ii., part 4, April, 1897, p. 156; Sykes, Proc. 

 Mai. Soc, London, vol. ii., part 2, July, 1896, p. 91. 



This is the most beautiful and elaborately sculptured 

 of all South Australian Acanthochitidce. It somewhat re- 

 sembles A. glyptus, Sykes, Proc. Mai. Soc, London, vol. ii., 

 part 2, July, 1896, p. 92. I have specimens from Robe, 

 Cape Jaffa, Normanville, Marino, and valves ( ?) from St. 

 Francis Island. I have seen them collected by Rev. 

 S. J. Martin at Wool Bay. Mr. F. L. Saunders has. 

 taken it at Port Victor. A number of specimens were 

 taken from the stomach of a whiting caught near 

 Edithburgh. Robe specimens in spirits measure 30x15 

 mm. The girdle is very fleshy and wider than the valves 

 themselves. They are of a very delicate milky colour, crossed 

 with splashes of green. Pilsbry evidently had only a dried 

 specimen. The specimens from Cape Jaffa and Normanville 

 are of a ruddy tint — stained, I think, by their proximity to 

 some ferruginous matter on lighthouse or jetty. One remark- 

 able feature in nearly every specimen collected has been the 

 presence of a light-green marking at the beak of the dorsal 

 area on the fifth valve. This helps to distinguish this shell 

 in nearly every instance. 



46. Acanthochites (Loboplax) variabilis, Adams 

 and Angas, 1864. 



Hanleya variabilis, Adams and Angas, Proc. Zool. Soc, 1864, 

 p. 194; Pilsbry, Man. Conch., ser. i., vol. xv., p. 101. 



Acanthochites (Notoplax ?) variabilis, Pilsbry, Proc Acad. 

 Nat. Sci., Philad., 1894, p. 84. 



