184 THE VICTORIAN NATURALIST. 



leaves and stems, but also the organ of attachment, which in this 

 instance forms a much-branched base, often so firmly fixed to 

 its matrix that pieces of the solid rock may often be seen still 

 fixed to the branching fibres. It is more than likely that Dr. 

 Goebel will give an interesting account of this plant in his forth- 

 coming work. 



The rocks, uncovered by the receding tide, were covered with 

 Horniosira banJcsii, their necklace-like thallus crackling under our 

 feet at every step. On the Hormosira were noticed small parasitic 

 plants, which proved to be tiny specimens of Notheia anomala. 

 Ulva latissima was very plentiful, its lovely green fronds waving 

 in every pool. Some of the smaller green seaweeds, Cladophora 

 and Chsetophora, were also noticed amongst the Ulva. 



The shore was strewn in some places with the bright-green 

 leaves of Cymodacea zosterifolia. Although this plant grows only 

 in sea-water it is not a true alga, but belongs to the family of 

 Fluviales, nearly related to the common Duck-weed, Lemna minor. 



Only one specimen of Codium inuelleri was found, although it 

 is very plentiful at Beaumaris. This curious plant is worth 

 notice. It has a rope-like stem, but very branching ; cut across 

 and examined under the microscope, it shows a thin solid thallus 

 surrounded by hair-like outgrowths. But the peculiarity of its 

 structure is that it has no septa; therefore, although so large and 

 branching, it must be placed amongst the unicellular seaweeds. 

 This characteristic may also be noticed in the Caulerpa, a speci- 

 men of which was found. 



A species of Rhabdonia was very common ; it had fruit, and 

 looked like R. robusta, but I submitted it to Mr. Bastow, who pro- 

 nounced it H. coultiri — a species I have not obtained before. 

 Another uncommon species which was found was Corynospora 

 australe, also unknown to me ; it greatly resembles Griffithsia 

 sonderiana. The curious Dictymenia tridens was very common ; 

 it is easily distinguished by the tips of the frond breaking into three 

 tiny branchlets. As usual on this coast, Lobospira bicuspidata was 

 present in large masses. Only one specimen of Caulerpa 

 hypnoides was picked up, and that most likely came as drift 

 from the Heads. Another stray seaweed was obtained, namely, 

 Bryopsis plximosa^ which hitherto has only been obtained on the 

 outside beach. Portions of different species of Sargassum were 

 very plentiful, their air-bladders enabling them to float anywhere. 

 The beautiful red Laurencias were also to be seen in great 

 quantities ; only one of the species could be identified. Only 

 one small specimen of the wonderful Dasya villosa was obtained ; 

 it is fairly common further round the coast; it is of such a glutinous 

 nature that it is extremely hard to dry. 



Altogether I consider that we had both a pleasant and a profit- 

 able outing. 



