61 
April, 1917. The Queensland NAxyRALiST. 
forms washed up, especially after south-east gales, are 
Noctiluca, Foraminifera ; various Hydroids on sea-weeds, 
Thuiaria Uihuliformis (identified by Mr. E. A. Briggs), Velella, 
Physalia, Cramhessa mosaica, and other medusas ; Cirripathes 
spp., Pleurohrachia sp ; Echinogorgia spp., one of which 
commonly has a symbiotic pecten, Pteria lata, and two 
cirripedes, Balanus navicula and B. cymhiformis ; Sycon, 
Stelospongia, Euspongia, Hip'bospongia, Aidena: gigantea, 
Chalina, etc., amongst the sponges, many of them harbouring 
Balanus spongicola, Acasta glans, Acasta sulcata, and the 
mollusc Saxicava australis ; coral skeletons (Porites, 
Madrepora, Goniastrea, Turbinaria) perforated by Pyrgoma 
spp., Creusia sp., Lithotrya sp. (boring cirripedes), Lithophaga 
(a boring bivalve), and Serpulids ; Pol}^zoa, such as Flustra, 
Memhranipora, Electra, Retepora, Lunulites, etc. ; pumice 
bearing Memhranipora, Lepas anserifera and sometimes L. 
anatijera, Amphinome spp., beautiful large anemones, and 
occasionally a Madrepore coral, and Algas, e.g., Caulerpa 
nummularia ; heart urchins {Maretia, etc.) ; Cephalopod 
shells [Sepia plangon and S. mestus, Spirula peronii, and 
occasionally Nautilus pompilins) ; lanthina violacea : and 
various sea-weeds, including practically every species 
found growing on the rocks and on the floor of Bribie 
Passage, as well as Codium spp., Sargassum flavicans, 5, 
stenophyllum, Cystophora paniculata (rarely), Eklonia 
exasperata (uncommon), Ttirhinaria (rarely), Gracilaria 
conjervoides, Hypncca, Amphiroa anceps, Galaxaura iinibellata, 
Asparagopsis delillei, Delisia pulchra, etc. 
Amongst the shell grit on the shore are the shells of a 
great number of mollusca, many of which live on the rocky 
beach, while many frequent deeper water, and some, no 
doubt, inhabit the adjacent Bray rock lying a short distance 
off Caloundra Head. The commonest molluscs (excluding 
those which live on the rocky beach) are various species of^ 
Area. Glycimeris australis, Natica spp., Polinices spp., 
Phasianella variegata, Diodora ticaonica (keyhole “limpet ’^), 
Cyprcea, spp. 
The valves of sundry other cirripedes, in addition to 
those species already mentioned as living on the rocky reef, 
are to be found, Balanus imperator and B. amaryllis being 
common, while Pyrgoma sp. is not uncommon. 
The Estuary. 
The ocean sand beach merges into the estuary, the sand 
becoming finer and more and more mixed with mud, until 
the mangrove regions in Bribie Passage are reached', where 
the shore is, in places, formed of soft mud. Where sand 
predominates, one meets with Donax deltoides and Polinices 
