BEDNALL : SOUTH ATJSTRALIAlSr POLTPLACOPHOEA. 



151 



20. Chiton tricostalis, Pilsbry. 



Chiton (canaliailatus, var. ?) tricostalis, Pilsbry : Nautilus, vol. viii 

 (1894), p. 54. 



This is a handsomely sculptured shell, though somewhat sombre in 

 hue. For many years I referred it to C. muricatus, Adams [i.e. 

 C. limans, Sykes] ; and under that name sent it to Mr. Pilsbry, who, 

 however, found it to be a new species. Length of type 17, breadth 

 11 mm. I have since obtained examples 30 mm. long by 13 broad. 



Hah. — Sultana Bay and Troubridge Shoal, at very low tides, under 

 blocks of limestone; also dredged in St. Vincent's Gulf by I)r. Verco. 



Mr. E. H. Matthews has a seven-valved specimen of the shell in his 

 collection. 



21. Chiton calliozona, Pilsbry. PI. XII, Fig. 6. 



Chiton [aereus^ var.] calliozona, Pilsbry: Nautilus, vol. viii (1894), 

 p. 55. 



and, moreover, 

 Mr. Pilsbry is 



Of the true Chitons this is our largest species, 

 exceedingly handsome. The description given by 

 exhaustive ; but he appears to have had from 

 me for the purpose but an ordinary-sized speci- 

 men — 17 X 9 mm. One now before me is quite 

 45 X 23 mm. ; and Mr. E. H. Matthews, who 

 should be credited with the discovery of this fine 

 species, is in possession of shells 50 X 25 mm. 

 He has lately obtained specimens beautifully 

 blotched in some of the valves with chocolate 

 brown. 



Hah. — Sultana Bay, at low - water, under 

 blocks of limestone ; also dredged in the same 

 locality. 



22. Chiton jugosus, Gould. 



Chiton Juqosus, Gould : Proc. Boston Soc. Nat. 



Hist., ii (1846), p. 142. 

 Chitori co7icentrici(s, Reeve : Conch. Icon. (1847), 



sp. 95. 



Two or three specimens of this Chiton were in 

 the local collections credited to South Australia, 

 but they could not be satisfactorily accounted for. 

 the Easter vacation 1896 several examples were obtained by Dr. W. G. 

 Torr, at Port Willunga. 



Chiton calliozona, 

 Pilsbry. 



However, during 



23, Chiton Coxi, Pilsbry. 

 Chiton Coxi, Pilsbry : Proc, Acad. Nat. Sci. Philadelphia, 1894, p. 85, 



A specimen of this shell obtained by me many years ago from 

 Kangaroo Island, remained in my collection as C. concentricus, 



