198 



Acmaea flammea, Quoy and Gairnard. 



Paielloidea flammea, Quoy and Gaimard, Voy. "Astrolabe," 

 -Zool., 1834, vol. iii., p. 354, pi. lxxi., figs. 15, 16; Verco, Trans. 

 Roy. Soc, S.A., 1912, vol. xxxvi., p. 183. 



Var. Jacksoniensis, Reeve (Patella), Conch. Icon., vol. viii., 

 1855, pi. xxxix., figs. 127a, 127b. 



King George Sound beach, many, similar to our South 

 Australian form, without a definite dark maltese cross, but 

 with four white radial bands more or less irregular and 

 indistinct. Shape mostly narrowed in front, some very much ; 

 Ellensbrook; Yallingup, many, up to 17 mm. by 13 mm. by 

 •5*5 ; Bunbury ; Rottnest Island, many and large, up to 

 25 mm. by 20 mm. by 12'5 mm. 



Var. Cruets, Tenison-Woods, Proc Roy. Soc, Tasmania, 1877 

 (1876), p. 52. 



King George Sound beach, up to 20 mm. by 16 mm.; 

 Yallingup; Bunbury; Rottnest Island, up to 25 mm. by 

 20 mm. by 11*5 mm. 



"Geraldton and Abrolhos Island" (Dr. Torr). They are 

 identical with the South Australian examples in shape, 

 size, and colouring. 



Acmaea conoidea, Quoy and Gaimard. 



Patelloidea conoidea, Quoy and Gaimard, Voy. "Astrolabe," 

 Zool., vol. iii., 1834, p. 355, pi. lxxi., figs. 5, 7; Verco, Trans. 

 Roy. Soc, S.A., 1906, vol. xxx., p. 214. 



Ellensbrook, 1, half -grown. A form was found on the 

 rocks at the south end of Rottnest Island, the largest example 

 being 22 mm. long, 18 mm. wide, and 12'5 mm. high; it may 

 be 18 mm. by 13*5 mm. by 8 mm., or 15 mm. by 11 mm. by 

 4 mm. There may be about 16 radial, thread-like ribs, with 

 from 2 to 5 intervening threadlets. These may be absent 

 except for obsolete primary threads. The apex is nearly 

 central, slightly anterior and blunt. The colour is wholly 

 black, with a black marginal band within. The rest of the 

 interior is white, except the apical third, which is lighter 

 or darker brown. In some the marginal black band may be 

 broken by a linear radial extension of the white interior to 

 the edge at one point towards the back, or at two symmetrical 

 points or at several, and in some specimens radial black 

 colour-bands are visible in the interior through the white. 

 When the shell is eroded outside some four or five white radial 

 bands may be displayed or quite a number, or the erosion 

 may destroy all the black outer coating and leave only 

 white ; and if the rubbing and rolling affect the margin, it 

 reveals an irregularly articulated border of white and black. 

 This, I think, is probably the P. conoidea of Quoy. Though 



