NOTES AND EXHIBITS. 761 



sponge itself, and a true Alga which has a similar shape to the 

 sponge, which however is not identical with the Pseudomorph, 



To illustrate his paper on the Rhizopoda Dr. v. Lendenfeld 

 exhibited a specimen of Amoeba villosa, admirably preserved in 

 dilute osmic acid by Mr. Whitelegge. 



To illustrate his paper on Onchidium, sections through the 

 dorsal eyes of O. Damelii were exhibited by Dr. v. Lendenfeld. 



Mr. Macleay exhibited a species of Monacanthits taken in a 

 trawl at Ball's Head, with the view of ascertaining if any of the 

 members present had any knowledge of the Fish. No one seemed 

 to know it. 



He also exhibited for Mr. Wilkinson, specimens of a Fossil 

 Crustacean from Forrest River, Cambridge Gulf, which Mr, 

 Haswell pronounced to be a Thalassina, a genus which burrows in 

 the mud of Mangrove Swamps. 



Mr. Ramsay, F.R.S.E., Curator of the Australian Museum, 

 exhibited the following fossil bones recently obtained from the 

 tertiary deposits in the caves of Wellington Valley. 



1. No. B., 6148. — The premaxillaries and scalpriform incisors 

 of a new species of Phascolomys, P. cu7-virostris, Owen ; Mr. 

 Ramsay considered that a new genus should be created for the 

 reception of the animal represented by this fossil, on account of 

 the peculiar depressed and indented anterior position of the 

 palate and peculiar curvature of the lower borders of the pre- 

 maxillaries. 



2. B. 5936. — This fossil represents the palate and molars of 

 the skull of a new species of kangaroo Palorchestes re2)haim, 

 Owen, the form of the foremost premolar (usually represented by 

 the formula 4 d) is different in shape, being broadly triangular 

 with rounded cusps and the other teeth are relatively larger and 

 the molar series longer than in other known species. 



3. B. 5939. — This is the left Os innominatum, and 



4. B. 5938 is the right femur of probably the same animal 

 P. rephaim, Owen, while 



5. B. 6442, is probably a collar bone or clavicle of the same. 



