210 B. H. Wood/card — Extinct 3[arsiq)ials, Western Australia. 



high, with a radiate micro-structure, and a radiately striate joiut-face 

 producing finely crenulate sutures. 



I am not acquainted with any similar stem from either the Chalk or 

 the Lower Tertiaries ; but that crinoids having such a stem must have 

 existed during those periods is rendered highly probable by the fact 

 that this is a usual form of stem in the Jurassic Apiocrinidse, and that 

 we still find it in their modern representative Calamocrimis as well as 

 in the Hyocrinidae. The discovery of this fragment, imperfect though 

 it be, leads one to expect that the missing links will ultimately be 

 found in their correct stratigraphical position. 



It is not probable that any of these crinoid fragments, the results of 

 Mr. Harmer's long years of collecting, are related to Tetracrinus felix. 

 Their sole importance in this connection lies in their bearing on the 

 age of the derived crinoid fragments found in the Red Crag. The 

 only direct evidence is that of Balanocrimis sullasaltiformis, which is 

 common in the London Clay, and probably had a wide range, since 

 a variety of it (var. Pratti) is common at Biarritz. Specimens in the 

 British Museum [75,838] were found at Harwich. In the London 

 Clay the substance of this fossil, as of the other echinoderms, is 

 generally changed into iron pyrites or marcasite ; and this is consistent 

 with the present condition of Mr. Harmer's Red Crag specimens. 

 They, however, differ in this respect from Mr. Harmer's other 

 specimens, which agree among themselves in having a beekite crust. 

 The silicification no doubt took place before they were redeposited in 

 the Crag, and, taken in conjunction with the possible belemnite nature 

 of one, it suggests the Upper Chalk as their parent rock. However 

 this may be, no inference can be drawn as regards Tetracrinus felix, 

 which retains its original calcite composition, pure and unsilicified. 



IV. — Extinct Marsupials of AVesteen Australia. 



By Bernard H. Woodward, F.G.S., C.M.Z.S., Director of the Westeru 

 Australian Museum. 



BEFORE the beginning of this year the only records of the 

 occurrence of fossil marsupials in Western Australia consisted 

 of the account of the discovery of Diprotodon bones in the Kimbeiiey 

 district by Mr. E. T. Hardman, the Government Geologist, in 1882, 

 and the finding of a lower jaw of this animal in 1895 in a gully 

 near Lake Darlot in the Eastern Goldfields by Mr. Arthur, who 

 presented it to this Institution. This jaw was so much weathered 

 that it was valueless except for the fact of its establishing the 

 existence of that marsupial so far inland. The Museum Committee 

 sent an expedition to Lake Darlot in 1898, and in 1908 the Hon. 

 Dr. Hackett sent out at his own cost Mr. Young, who was with 

 Mr. Arthur when he found the jaw in 1895. Both these parties 

 were unsuccessful. 



In February, 1909, Mr. John Sharp, of Balladonia, Point Malcolm, 

 on the south coast, sent to the museum a number of bones and 

 a few teeth of Diprotodon australis that he had unearthed when 

 excavating for water in a marsh on his station. These specimens 



