Lower Silurian. 1 , PALEONTOLOGY OF VICTORIA. [Graptolites. 



1 young, oval : length, 3^ lines ; width at middle, 3 lines ; 

 width of axis, ^ line; 7 cell points in 2 lines of side margin. 



In most specimens the axis becomes undefined on approaching 

 the ends, but in some it slightly jirojects as a blunt angular point 

 below. Mr. Salter's figure oi D. folium (Quart. Jour. Geo. Soc. L., 

 V. viii., t. 1, fig. 12), which I quite agree with him in believing 

 identical with Hisinger's type, makes a nearer approach, on a 

 small scale, to our form than any other. 



Since the above was written I received Mr. Hall's paper, which 

 he was kind enough to send me, estaljlishing on this form his 

 genus Phyllograptus^ and making known from the " Hudson River" 

 formation of Canada a pei'fectly identical series of varieties, which he 

 unites under the name P. fypus, which I adopt for the large variety. 

 Several of the specimens in the soft Bendigo slates show, I think, 

 evidence of the laminae of connected cells imbedded at difi^erent 

 levels, though united to one midrib, favoring his view of four semi- 

 elliptical leaflets being joined by their straight inner edge, diverging 

 rectangularly, instead of a simple ovate flat frond with midrib. One 

 of the specimens from B'' 5 also favors the same view. 



Very abundant, of great size (often 1^ inches long and | of an 

 inch wide), and every variety of form in the black Llandeilo flags, 

 or Bala rock of the ranges N. of Camp Laucefield (B'' 29) ; also in 

 the similar rock, section 20, Newliam (B" 29) ; an ovate specimen, 

 1 inch long, much wider in the lower than the upper half in the 

 altered slates on the east bank of the River Loddon, half way 

 between the junction of the Boundary Creek and Middleton's 

 Creek (B'' 76) ; very common in the soft white altered Llandeilo 

 flags at Beudio-o, between the srold reefs. Abundant and well 

 preserved in the Llandeilo flags (B" 27) of the camp near Lance- 

 field. Not uncommon in the black glazed slates (B'^ 5) on branch 

 creek W. side of Lerderberg, 2| miles N.W. do. do. One of the 

 specimens shomug the four semi-elliptical leaflets on lamiuiB of 

 the shale, accidentally broken at the diflferent levels, but still in 

 contact at the extremities. In the black slates (B'^ 4) of the 

 River Lerderberg, 3 miles N.W. of McLeod's station ; in flags 

 of B" 41 ; in black flags of B'' 39, wdth SiphoJiotreta micula 

 (McCoy) ; in flags B" 27 and 28 ; flags of E. bank of Saltwater 



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