268 



oides, and is therefore known from the Macqnarie, Hunter, and 

 Richmond Rivers. 



[Carditella subtrigona, Tate. 

 Many living examples of this species were dredged by Dr. Verco 

 in Yankalilla Bay. The shell is covered with a thin epidermis of 

 a pale-horn colour, varied with a more or less difiused flesh-tint. 

 The largest examples have the following dimensions : — Antero- 

 posterior, 7*75; umbo-ventral, 7; and sectional diameters, 5.] 



Cardita Gunni, Deshayes. 



Proc. Zool. Soc, 1852, p. 101; C. Atkiiisoni, Ten.-Woods. 



A suborbicular cordate shell, with from 17 to 19 nodosely 

 squamose ribs about as wide as the furrows. Long., 13; lat., 

 12 mm. 



In deep water off Kangaroo Island ; Yankalilla Bay ; 

 Encounter Bay; also Tasmania. 



Leda Vereonis, Tate^ antm, p. 264. 

 Yankalilla Bay; Holdfast Bay. 



PeetuneulUS SOrdidUS, Tate, antea, p. 264. 

 Off Rapid Head, St. Vincent-Gulf. 



[PeetuneulUS Gealei, Angas. 



Proc. Zool. Soc, 1873. t. 20, fig. 5, p. 183. 



F. Jlabellatiis, Ten.-Woods, Trans. Roy. Soc, Vict., 1878, p. 61. 



F. laticostatus, Angas, P.Z.S., 1878, p. 871. 



F. orbicularis, Angas, P.Z.S., 1879, t. 35, tig. 9, p. 420. 



F. Beddomei, E. A. Smith, Lamell. Challenger Ex., 1885, 

 p. 255, t. 18, figs. 1-16. 



There is no doubt that 7^ Jiohellatiis and F. Beddomei are the 

 same, though Woods' diagnosis is not satisfactory, however, the 

 excellent figure of F. Gealei (a New South Wales shell) permits 

 one to refer, without hesitation, the species of Woods and Smith 

 to it. F. orbicidaris, described from a Bass-Straits shell, repre- 

 sents a young stage of the same species, Avhich is remarkable for 

 its long straight hinge-line.] 



Modiola arboreseens, Chemnitz. 



Mytilus arboreseens, Chemnitz, Conch. Cab., vol. 2, t. 198, 

 f. 2016-17. 



Modiola arboreseens. Reeve, Con. Icon., t. 6, f. 30 (1857). 



Modiola jncta^ Lamarck, An. S. Vert., vol. VI., p. 112 (1819); 

 id. Sowerby, Genera of Shells, fig. 1. 



A compressedly-convex cylindrically-oblong shell, white under 

 a pale-yellow highly glossy epidermis, the posterior slope divari- 

 <3ately netted with fine purplish lines. 



