28 Notices of Jlemoirs — Diprotodon australis. 



evidently belong to the Upper Gault (zone of Ammonites rostratus), 

 are very noteworthy. 



Lastly, it is reniaikable that these sands in the Gault should yield 

 an abundant supply of water. In the case of the Dieppe boring the 

 water rose to about 12 feet above the surface, and at Eu it rose to 50 

 feet above the surface with a yield of 750,000 litres in the 2-i hours. 



The beds traversed by the two borings may be summarized thus : — 



Dieppe. Chateau d'Eu. 



Feet. Feet. 



Surface deposits 9? ... 35-7 



Middle Chalk 280-3 ... 195-4 



Lower Clialk, with Chloritic Marl 



at the base 229-6 ... 224-8 



Gault (not pierced) 174-5 ... l(i7-5 



693-4 563-4 



n^OTICIES OIF nVLElVnOHRS- 



DiPROTODoy AUSTRALIS. FossiL Eemains OF Lake Callabonna. 

 Part I : Description of the Manus and Pes of Diprotodon australis. 

 By E. C. Stirling, C.M.G., F.K.S., etc., and A. H. C. Zietz, F.L.S. 



rpHIS lavishly illustrated memoir contains the first instalment of the 

 X. description of the remarkable series of skeletons of Diprotodon 

 discovered some years ago in the dried-up bed of Lake Callabonna 

 in South Australia. A brief account of the discovery was published 

 in Nature (vol. L, 1894, pp. 184 and 206) by Professor Stirling, and 

 a description of the remarkable bird-remains from the same locality 

 has also appeared. 



The present memoir deals with the structure of the fore and hind 

 feet, wliich are almost the only important parts of the skeleton not 

 described by Owen. The collections included a considerable number 

 of more or less complete feet, so that the authors have been able not 

 onl}^ to describe in great detail the separate bones, but also to give 

 restorations of the manus and pes, both of which exhibit some 

 remarkable characters. 



The fore-foot possesses five complete digits, of which the fifth is 

 the largest; the fifth metacarpal has a broad flange-like expansion 

 on its outer side. The pisiform bears more than half the articular 

 surface for the ulna. 



The hind-foot also possesses five digits, but the first consists of 

 the metatarsal only. The second and third digits are extremely 

 slender, the fourth only a little stouter, but the fifth is very much 

 thicker, the metatarsal bearing a great flange-like expansion. The 

 whole foot is a most remarkable structure, but, although considerably 

 modified on account of the great weight it had to bear, it still retains 

 distinct marsupial characters. 



The general conclusions arrived at by the authors are as follows: — 



" Marsupial characters are evident in both the manus and pes of 

 Diprotodon. 



