198 : 
C ’ Z 
Ct > xAcmea ftammmea, Quoy and Gaimard. FEE 
Patelloidea flammea, Quoy and Gaimard, Voy. ‘‘Astrolabe,” 
Zool., 1834, voi. iii., p. 354, pl. Ixxi., figs. 15, 16; Verco, Trans. 
Roy. Soc., S.A., 1912, vol. xxxvi., p. 183. 
Var. Jacksoniensis, Reeve (Patella), Conch. Icon., vol. viii., 
1855, pl. 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 mm. 
Var. Crucis, 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 115 mm. 
“Geraldton and Abrolhos Island” (Dr. Torr). They are 
identical .with the South Australian examples in shape, 
size, and colouring. 
2 ALLA &Acmea conoidea, Quoy and Gaimard. LEE 
Patelloidea conoidea, Quoy and Gaimard, Voy. ‘‘Astrolabe,’’ 
Zool., vol. iii., 1834, p. 355, pl. Ixxi., 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 
4mm. 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 
