218 
Fig. 2. 
Ptilog-raptus sp. 
(Nat. size.) 
Ptilograptus sp.—Nos. 161 (figured), 173. The length of 
the “ pinnae ” is shorter than the extreme one quoted by 
James Hall,* but the specimens resemble his figure very closely. 
In fact, I am unable to point out any difference between our 
specimens and P. plumosus, J. Hall. Number 173 shows a 
branching of the main stem. 
The associated forms at Point Levis are lower ordovician, while no 
restricted representatives of that age occur in the present collection. 
As the series submitted was obtained from several pebbles in the conglo¬ 
merate, it is not worth while discussing the collection as a whole, but, judging 
by the matrix, the probability is that all belong to the same series, which on the 
evidence of the Dicellograptus may be called upper ordovician. There is 
nothing in any of the other genera present contradictory of this view. 
University, Melbourne, 14th April, 1904. 
From Knowsley East, Nos. 174-217. 
One of the forms somewhat distantly resembles Ptilograptus, but I am 
inclined to doubt the graptolite nature of all of them, and to consider them as 
Alg8e.*j* 
Associated with these are a few lingula-like brachiopods and a few sponge 
spicules. 
University, Melbourne, 23rd July, 1902. 
From near the “ Trap ” area marked on Quarter-sheet 15 N.E., 
near Vaughan, Nos. 218-235. 
The graptolites submitted from this locality are identical in appearance 
with those mentioned by myself in a paper on the geology of Castlemaine as 
coming from Tarilta.} As the matrix is the same, and as the “ Trap ” area 
is practically at Tarilta, I think the two collections come from the same out¬ 
crop. 
The species present are Didymograptus bifidus, D. extensus {?), Tetra- 
graptus quxdribrachiatus, T. serra, T. fruticosus (three-branched variety), 
Dichograptus sp. indet., Plujllograptus typus and P. sp. 
The horizon is that which I have called the Tetragraptus fruticosus zone, 
and judging by the presence of D. bifidus , and the fact that T. fruticosus is 
represented by the three-branched variety, the beds may be looked at as 
probably the almost exact equivalents of those exposed in Wattle G-ully, on 
the great Chewton anticline. The beds coming up at Tarilta are not, as far 
as my examination of the country some years ago went, visible to the north, 
owing, most likely, to a northerly pitch, and the only rocks outcropping in 
that direction are those belonging to higher zones. 
o o o 
University, Melbourne, 14th August, 1902. 
* Grap. Quebec Group, p. 140. 
| [These specimens have been examined by Mr. J. E. Marr, F.R.S., of Cambridge, who has 
determined them as probably algse.— J.W.G.] 
J Proc. Roy. Soc. Victoria, 1894, p. 76. 
