BEDNALL : SOUTH AUSTRALIAN CHITONS. 



153 



Hah. — Dredged generally iu St. Vincent's Gulf. Also taken under 

 blocks of limestone, Sultana Bay. 



Most nearly allied to C. Bednalli, but the sulci of the pleura are 

 more numerous, and many more of them are short, not attaining- the 

 anterior border of valve toward the lieaks. The sulci of the pleura are 

 continued and curved inward upon the slope of the diagonal line. The 

 outer slope of each individual rib of the pleura is more abrupt than the 

 inner, giving a somewhat imbricate effect. Chiton Coxi differs from 

 this species iu having fewer sulci on the pleura, nnsculptured lateral 

 areas, and non- serrate sutures. 



25. Chiton Bednalli, Pilsbry. Tl. XII, Fig. 8. 

 Chiton Bednalli, Pilsbry, Nautilus, ix (1895), p. 90. 



Ilah. — Sultana Bay, Yorke Peninsula, one 

 specimen. 



This form is very closely allied to C. exoptandm. 

 The latter differs, however, conspicuously in 

 coloration. 





^L^ 



Chiton Bednalli, Pils. 



2G. LoRiCA VOLVOX (llccve). 



Chiton volrnx, Reeve, Conch. Icon., sp. 31 ; 



Pilsbry, Man. Conch., ser. I, vol. xiv, 



p. 237, pi. lii, figs. 14-21. 

 Chi' on cimolius, Reeve, Conch. Icon., sp. 141. 



This well-known New South "Wales sjiecies 

 occurs in South Australian waters at three 

 localities in St. Vincent's Gulf, viz. : Port 

 Willunga, Marino, and Sultana Bay, where it 

 is obtained at low tides under blocks of stone. 



It is not a scarce shell, and it is therefoi'e 

 curious that it is omitted from Mr. Angas' List; 



he, however, mentions it as occurring at Port Lincoln in a list of New 

 South Wales shell? published in the Proc. Zool. Soc. 



27. LoRiCELLA Angasi (Ad. & Angas). 



Lorica Anxjan, H. Adams & Angas: Proc. Zool. Soc. 1864, p. 193; 

 Pilsbry, Man. Conch., ser. I, vol. xiv, p. 238, pi. li, 

 figs. 9-13; Proc. Acad. Nat Sci. Philad. 1894, p. 87. 



Hah. — Sultana Bay (Matthews) ; Rapid Bay (Angas) ; Holdfast 

 Bay (Bednall) ; New South Wales (Cox, Brazier). 



This fonn is by no means easily obtained, and for the reason, I 

 believe, that it is located in deeper water I was fortunate on one 

 occasion in getting a very fine specimen, which was on a large frond of 

 fucus, thrown up on the beach after a heavy gale. The differences 

 |: between this and the preceding species have been noted by Dr. 

 Carpenter, and reproduced in the Manual of Conchology. The peculiar 

 features of L. Angasi have subsequently been indicated in Pilsbry's 

 paper on the Port Jackson Chitons. 



VOL. II. — APRIL, 1897. 



11 



