T. S. Sail — GraptoJite Rocks, Victoria, Australia. 445 



Wilkinson in 1864. The fauna differs from the tj'pical Castlemaine 

 one by tlie almost entire absence of Didymograptns caduceus, and the 

 appearance of Lasiograptus and Glossograptiis. Trigonograptiis and 

 several species of I)idymograptus and Clirnacograptiis occur, while 

 Tetragraptiis serra and Loganograptus still persist. Sir F. McCoy 

 records Telragraptus Hendi, but judging by the figure and description 

 I am inclined to doubt the identification. 



The beds are very rich, and many new forms are present, but the 

 rocks at the only fossiliferous localities known are so much weathered 

 that further elucidation of the fauna is rendered difficult. 



This series appears to mark the close of the Lower Ordovician, as 

 in the succeeding rocks Dicranograptidse put in an appearance. 



Upper Ordovician. 



No stratigraphical work has yet been done in the Upper Ordovician 

 beds, so that in the present state of our knowledge it will be unwise 

 to attempt any correlation based on the occurrence of a few stray 

 forms the vertical range of which we cannot positively state. 



Eocks rich in graptolites, but in a very bad state of preservation, 

 occur on the Saltwater River about twenty miles north of Melbourne. 

 There are present Coenograptus gracilis, apparently, as well as 

 Dicranograptus ramosus and several species of Dicellograptus and of 

 Diplograptidge. 



A somewhat similar fauna has recently been found near Matlock 

 on the Woods' Point Road,^ whence 1 have identified Diplograptus 

 foliaceus, Murch., and perhaps Dicellograptus Morrisii, Hopk. Diplo- 

 graptidas are also represented. The rocks of this area have long 

 been considered Silurian from the occurrence of Cardium Gippslandi- 

 cam, McCoy, the only fossil known from the district. Elsewhere 

 this Cardium is associated with an Orthoceras, identified by McCoy 

 as 0. striatopunctatum, Miinst., and so considered b}?^ him to be of 

 Silurian age. As the age of the graptolites is Ordovician beyond 

 a doubt, the fact of the occurrence of Silurian rocks in the neigh- 

 bourhood may be questioned till better evidence is forthcoming, 

 though of course the Ordovician may be a small inlier. 



The age of the rocks in North-Eastern Victoria was long in 

 doubt, but the discovery by Mr. Ferguson ^ of what proved to be 

 Upper Ordovician graptolites at three widely separated localities 

 showed that a great part of the area must be occupied by rocks of 

 that age. I have identified Dicellograptus elegans, Carr., and 

 Climacograptus hicornis, J. Hall, from Wombat Creek, where 

 Diplograptidge are also represented. At Tungamah we get Diplo- 

 graptus pristis. His., and perhaps Dicellograptus sextans and Dicello- 

 graptus ramosus, all, however, badly preserved. From Walwa 

 Creek come Dicellograptus anceps, Nich. ; Diplograptus pristis. His. ; 

 D. truncalus, Lapw. ; Climacograptus hicornis, J. Hall. From 

 Eastern Gippsland a few forms, also belonging to the Upper 



^ Proc. Roy. Soc. Victoria, new ser., vol. x (1897), pp. 13-15. 

 2 Id., vol. X, 1896 (1897), pp. 183-6. 



