213 
A. jacksoniensis, Reeve (type locality, Port Jackson), is 
represented in Tate’s collection of South Australian shells, 
but I am unable to separate them from A. flammea, Quoy and 
Gaimard, and agree with Pritchard and Gatliff, who unite 
them. The type locality of P. miata, Reeve, is Port Phillip, 
Victoria. Tate and May make jacksoniensis, Reeve, a syno- 
nym of A. gealei, Angas, as a distinct species, owing 
to the pre-occupation of Reeve’s name by Lesson. 
The two type shells of P. geale, in the Bri- 
tish Museum, from South Australia, presented by 
Mr. G. F. Angas, are 24 mm. by 21, regularly roundly oval 
in the base, with an almost perfectly regular thin margin, 
with no radial ribbing, nor any radiating dark colour bands. 
I think they are large albino variants of A. erucis, Ten.- 
Woods. 59 . rn 
1S) : 
A, gealei, Angas, was formerly regarded in South Aus- 
tralia as a synonym of A. marmorata, Ten.-Woods, No. 399, 
Adcock’s Handlist; and Pritchard and Gatliff gave it priority 
and made the latter the synonym; but examination of the 
type shows absolute non-identity. 
The shell is certainly very variable. One form has. 
numerous well-marked radial riblets, and a sharp apex, and 
may be regarded as the typical 4. flammea, Quoy. A second 
has no radial riblets, or only obsolete, is a larger shell, and 
is the typical 4. crucis, Ten.-Woods. A third has compara- 
tively few radial coste, which are broad and rude, and some- 
what corrugate the surface, and is the Patella jack- 
soniensis, Reeve. A fourth is very like the second, 
but differs in having no radial colour markings, or radial 
ribs, and is the A. gealei, Angas. But all four can be graded 
into one another in continuous series. The comparative 
héight varies, some shells being quite conical, and otherswery 
flat. The colour ornament may consist solely of the dark > 
spatula, or a distinct broad Maltese cross may be present, or 
each arm may be broken up into two or more brown lines, or 
brown lines may intervene between them, or only brown 
radii may occur, or the, ornament may be a _brown- 
and-white tessellation or reticulation at the apex only, or 
all over the shell, or combined with the cross. The inner 
border may ve wholly white, or have a brown border, or be 
articulated brown and white, or show only the four broad 
ends of the brown cross. Among all the specimens collected 
I have not found one coloured like A. cruciata, Linn., with 
the white rays at the centre of the front and back and sides, 
and the brown between. ; 
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