122 
UEMOIBS OF THE QUEENSLAND MUSEUM. 
BARNACLES FROM MAGNETIC ISLAND, NORTH 
QUEENSLAND. 
By Thomas H. Withers, F.G.S., F.Z.S. 
Published by permission of the Trustees of the British Museum. 
(Text-figs. 1, 2.) 
Two pieces of limestone containing remains of barnacles were submitted 
to me for examination and report by Mr. H. A. Longman, Director of the 
Queensland IVruseum, in 1930. 
These barnacles he thonght belonged {see Longman, Abstr. Proc. Roy. Soc. 
Queensland, 1930 (1929), ]>. x.) apparently to Coronula, a form found living 
attached to whales. 
The pieces of limestone were found by Miss Marian Rowland among 
rocks considerabl\' above high-water mark on Magnetic Island, North Queensland. 
Evidently they represent a comparatively recc.7it de]70sit, possibly of Pleistocene age, 
ami both pieces were apparently originally attached to a pink biotite granite, for 
fragments of such a rock can be delected on the nnder surface of each. 
One piece (E. 2()2(i) is compo.sed almost entirely of a mass of Serpula tubes 
vhich have grown over a number of barnacles. Now that it has been removed from 
its original attachment, only the base.s of the barnacles can be seen. Among the 
barnacles is a single specimen of TetmcUla with its typical cellular walls, but the 
four compartinciits can only be seen on the inner side of the sheath. There are also 
five examples of Oriomcris, in wliieh the eight compartments are clearly shown, and 
seven examples of Chfhamalus, showing their six compartments. 
‘'^'^'^ond specimen consists mainly of the remains of barnacles, apparently 
all belonging to Ociomeris. but so encrusted with calcareous matter that only in a few 
instances is it at all jiossiblo to see the. form of the shell. Both pieces of ‘limestone 
are somevliat waterworn, and the bases of the barnacles are worn down. 
I'ai'iiac'les are tlierefore reiire.sented, namely, Tetradita, 
Odmnens, and Chthamalus, and all three inhabit the littoral zone. So far Odomeris 
has not been recorded from Australasian waters 
Family BALANIILF. 
Genus TETEACLITA, Schumacher, 1817. 
TETRACLITA sp. 
The single shell shows only the base, and it is not possible from this to determine 
more than «ie genu.s It possibly represents one of the varieties of Tetradita squamosa 
(Briiguiere). The shell has a rostro-carinal length of 26 mm. 
