246 NOTES AND EXHIBITS. 



to conclude that these Molluscs had only migrated north, following 

 some current of water of the same temperature as these species 

 which were found in Tasmania. 



Mr, Wilkinson also exhibited a collection of splendid specimens 

 of Grasses and other Plants, including about 60 varieties from the 

 Wonominta Station in the Albert District. They were collected 

 and presented to the Society by Mrs. Robert Kennedy. Grass 

 had scarcely been seen in this country during the past four years, 

 owing to the drought ; but since the late rains there has been a 

 most luxuriant growth. Mrs. Kennedy has forwarded a duplicate 

 collection to the Colonial and Indian Exhibition in London. Mr, 

 Wilkinson considered that owing to the almost isolated position of 

 the Barrier Ranges, some of the flora may be peculiar to the 

 locality, and probably new and valuable fodder plants will be 

 discovered there. 



Dr. R. von Lendenfeld stated that he had discovered sensitive 

 and ganglia cells similar to those which he had described as 

 occurring in Calcareous Sponges, now also in the horny Sponges. In 

 a species belonging to the Family Spongidoe, there exists an extra- 

 ordinary lacunose tissue outside of that layer, which is homologous 

 to the outer skin of other Sponges, By movements of the 

 extremely fine membranes constituting this tissue the water 

 current is regulated. In the lines where the membranes are 

 joined, ganglia cells are found in small groups and apparently 

 there belong a number of sensitive cells to each ganglia cell group. 

 These cells are much larger than the corresponding elements of 

 Calcareous Sponges. 



Mr. Macleay exhibited some Fresh Water Fishes, which he had 

 received from Mr. Charles Jenkins, L.S., of Yass, They consisted 

 of specimens of the genus Iltcrraya, Castelnau, an Oligorus of very 

 remarkable form, and a remarkably elongate Gado2Jsis, all from the 

 Little River in the Alpine Regions of the Murrumbidgee. Also, 

 a species of Galaxias from the Yass River. He stated his intention 

 of describing them at the next meeting. 



