672 MR. TOM IREDALE ON MOLLUSCA 
Australia and Swan River, West Australia, confirm this dis- 
position, as they closely approach the South-Kast Australian species 
and are very different from any form of Aemea saccharina. 
These sketchy remarks must well show the confusion that exists 
in this family, and the urgent need of ‘a skilful and careful 
monographer. 
My notes would read easily if summarised thus :—dAemea 
saccharina Linné. ‘Type locality, Philippine Islands, divisible 
into subspecies: Patella lanx Reeve, Japan, one valid name. 
Patelloida stellaris Quoy & Gaimard, New Ireland: form probably 
recognisable, name invalid, Subspecies ranging from Cape York 
westwards to Monte Bello Islands and southwards to Port 
Curtis, recognisable but unnamed. 
Acme saccharina, var. perplexa Pilsbry is a distinet species, 
commonly called Aemea octoradiata Hutton, but Hutton’s name 
is Invalid. 
Acnuea alticostata Angas is the name for the Sydney shell, 
which ranges southwards through Bass Straits and then west- 
wards to Geraldton, West Australia, and this is quite a valid 
species. Sowerby’s Lottia ? costata (type preserved in the British 
Museum) came from Arica, Peru, and has no connection with the 
Australian shell erroneously so-called, 
Acmea stella Lesson, from New Zealand, is closely allied to 
A. alticostata Angas, bar is certainly separable as a distinet 
species. 
The group is well marked and has been classed under Colli- 
sellina Dall 1871, but Quoy and Gaimard’s genus name Patelloida 
seems to claim usage on account of Gray’s designation of P rugosa 
Q. & G. as type. I regard this species as certainly referable to 
this group. 
EULIMA MONTAGUEANA, sp. n. (Text-fig. 1 A, B.) 
Shell of medium size for the genus, thin, smooth, solid, glassy, 
imperforate, not translucent, variced, many-whorled, sutures 
impressed. Colour milk-white. In shape it 1s she anply conical 
with the spire somewhat tending backwards. The largest specimen 
has the apex missing, but fourteen whorls remain. The next in 
size, which I select as the type, has the apical whorl somewhat 
bulbous and succeeded by fifteen whorls, the basal three or four 
whorls showing a peripheral keel. Varices regularly sueceeding 
and advancing | spirally can be observed on the last ten whorls - 
on the spire shins these are too indistinct for recognition. 
Aperture obliquely pyriform, outer lip simple but not thin, 
base somewhat contracted; columella straight and reflected as a 
slight callus which extends across the body-whorl to join ‘the 
outer lip at the posterior angle. 
Length of type 17-5 mm., “breadth 5:5 mm. 
Pavia. Off Hermite Island, Monte Bello Group. Dredged in 
4 fathoms 
