350 NOTES AND EXHIBITS. 



.Mr. E. Le G. Troughton exhibited, with the permission of the Director of 

 the Australian Museum, a very remarkable skull ot.Bettongia ctiniculiis, a Rat- 

 Kangaroo, showing features of the cheek-teeth which are characteristic of the 

 young animal on one side and of the adult on the other. In the young dentition, 

 ^\hicli is on the right side, the two premolars are present but are followed by 

 five molars instead of only three as is normal at this stage. The dentition on 

 the left side is typical of the adult, exhibiting the enlarged fourth premolar 

 which takes tlie place of the two milk-premolars, while only four molars are pre- 

 sent. 



Also a specimen of the yellow-footed Pouched blouse, Phascogale flavipes, 

 accompanied by photographs, taken by Mr. A. Musgrave, of a nest of the species 

 and its locarion. The specimen and photographs were taken at National Park, 

 N.S.W. 



Mr. N. 13. Friend exhibited the fangs and dried venom taken from a Diamond 

 Rattler Snake (Crotalus ad-amantetis) at Taronga Park. This species gives a 

 very large t(uantity of venom at one injection. The amount of dried venom 

 obtained was 0.5 gram and corresponds to about 30 lethal doses for a rabliit. 



Mr. E. Cheel exhibited a series of specimens of the Rai or Indian Mustard 

 (Brassica juncea Cass.), showing the earlj' seedling stage, together with the 

 flowering and seedling plants cultivated at Ashfield from plants which he found 

 naturalised in the Rarawai District, Fiji, in July, 1918. He also exhibited two 

 forms of "Colza Rape" ( B. campestris) received from Mr. A. Willis, said to 

 have come from the North Coast District of this State. Samples of the original 

 seeds exhibited showed two distinct kinds, which, when selected and grown 

 separately, produced plants very much alike in general character, but the cap- 

 sules of one kind are shorter and thicker, and the plants somewhat glaucous, and 

 the seeds of some of the resultant plants are of a pale brown, or in some cases 

 light yellow or white colour. Some pale yellow seeds separated from the original 

 sample and grown separately proved to *be indistinguishable from the "White 

 Mustard" (B. alba). Samples of "Field Rape" (B. napus) and "Black Mustard" 

 {B. nigra] seeds were also exhibited for comparison. Specimens of the "Rock 

 Salad" (Erttca sativa Mill) were also exhibited, raised from impurities obtained 

 from Linseed received from Mr. A. Willis. The latter species is naturalised in 

 several parts of this State, and in South Australia. 



Mr. E. Cheel also exhibited fresh specimens of three interesting orchids, viz.: 

 Pterostylis barbata (very rare in the Port .Jackson District) Caladenia tesselata. 

 also comparatively rare, and Lyperanthus nigricans, all collected at Little Bay 

 by Mr. H. L. Duckworth. It is interesting to note that the area where Lgperan- 

 thus nigricans was collected had been overnm by a bush-fire during last sca.son. 



