BEBNALL : SOUTH ATJSTEALIAN" CHITONS. 155 



obtained at a part of the coast-line of Soutliern Yorke Peninsula that is 

 very seldom visited. I ascei'tained that, although living in the same 

 neighbourhood as P. petholata, it is easily distinguished by its bright 

 green girdle and the diiferent nature of the bristle, and also that it 

 attains a larger size. When di'ied the girdles of both species assume 

 the same appearance ; but there is no diihculty in separating the 

 species, for the valves of P. glauea are not corrugated as are those of 

 P. petholata. I do not think there is any doubt that Mr. Pilsbry is 

 right in his surmise that this "is probably the form Angas collected 

 at Guichen Bay, South Australia, and listed us P. ciliata.'''' 



31. ACANTHOCHITES ASBESTOIDES (Smith). 



Chiton [Aeanthochiton) ashestoides (Cpr. MS.), Smith : Zool, Coll. 



H.M.S. "Alert," p. 83, pi. vi, fig. G; Pilsbry, Man. 



Conch., ser. I, vol. xv, p. 17, pi. ii, fig. 55. 

 Acantliochites asbcstoide.i, Cpr. : Pilsbry, Proc. Acad. Nat. Sci. Philad. 



1894, p. 79, pi. iii, figs. 16-20. 



The description of the species is fully given by Mr. E. A. Smith, 

 and the salient features of the shell have further been recapitulated 

 by Mr. Pilsbry. One specimen in my collection, were it not curled, 

 would measure 20 mm. in length. 



Hab. — Southern Yorke Peninsula (common) ; Rapid Bay, east side 

 of St. Vincent's Gulf; Port MoUe (Queensland). I have also specimens 

 collected in Hobson's Bay (Victoria), which should confirm the locality 

 of the type-specimen in the British Museum. 



32. AcANTHOCHiTES Bednalli, Pilsbry. 



Acantliochites Bedndli, Pilsbry: Proc. Acad. Nat. Sci. Philad. 1894, 

 p. 81, pi. ii, figs. 7-11. 



To the very full description of the above shell, Mr. Pilsbry adds the 

 following: — "The species is closely allied to A. granostriatus, but 

 the valves are more solid ; the dorsal areas are much more deeply striated 

 longitudinally ; that of valve viii is largely broken into granules. The 

 sutural laminge in A. Bednalli are greenish; the pustules of the side 

 areas are somewhat hirger and rather less regularly arranged 

 in longitudinal series. A. Bednalli differs from A. Coxi. in having 

 much more conspicxious and silky sutural tufts, in the colour of the 

 interior and sutural laminae, in the flat pustules, and in lacking 

 the curved diagonal rib, which in A. Coxi extends from the apex of 

 each median valve to its lateral slits." Length 13, breadth 6-5 mm. 



Hab. — Occurs plentifully in company with A. ashestoides at Sultana 

 Bay, Yorke Peninsula, under very small stones, near high-water mark. 

 I do not yet know it from any other locality. 



33. AcANTHOCHiTES GRANOSTKiATUs, Pilsbry. 

 Acanthochites granostriatus, Pilsbry: Nautilus, vol. vii(1894), p. 119; 

 Proc. Acad. Nat. Sci. Philad. 1894, p. 81, pi. ii, figs. 1-6, 

 pi. iv, fig. 37. 



This species was included amongst a number of Chitons submitted 



