and Paleontology of Victoria. 201 
further, on carefully comparing Bohemian specimens of the G. 
ovatus of Barrande with the Swedish G. folium, I have no doubt 
they belong to one variable species, and are identical with the 
smaller examples of the Australian and Canadian species, and, 
further, that-the European specimens are truly quadrifoliate, 
like Hall’s Phyllograptus; and in this way the difference in the 
different descriptions, as to the width of the midrib, becomes 
intelligible. 
As a general rule, the Graptolite-slates in every part of the 
world contain no other fossils. I many years ago discovered in 
Wales, near Builth, the only shell I ever heard of in Graptolite- 
slates (the Siphonotreta micula, M‘Coy); and I was greatly sur- 
prised to recognize it also in Victoria, in thé Deep Creek section. 
The Crustacean genus Hymenocaris is represented by a new 
species, H. Salteri (M‘Coy), found in most of the Graptolite- 
slate localities. 
In a different set of sandy, marly, and mud-stone beds (as at 
Woori Yallock, Yarra) we find :—an extensive series of the genera 
and many of the species of Corals, Trilobites, and Mollusca of 
the “ Bala beds” of North Wales; species of Favosites*, Paleo- 
pora, Calymene, Phacops, Beyrichia, Strophomena, Leptagonia 
depressa, Spirifera reticularis, Orthis elegantula, the characteristic 
little genus Cuculleila, Murchisonia, Conularia, &c.; and some 
species new, and some identical with British ones, forming a 
group so completely reproducing the well-known Bala beds as 
to afford a second case in support of the view of the general 
specific identity of the marine fauna over both hemispheres of 
the whole world in the earliest paleozoic times. 
It is curious that I have not yet seen any trace of the genus 
Trinucleus in Australian beds, nor Ampyz, while all the above- 
mentioned genera of Trilobites, with Acidaspis, Chirurus, &c., 
are well marked. 
I can scarcely close this part of the subject without drawing 
attention to the curious confirmation offered in Victorian geo- 
logy of the view of Professor Sedgwick and myself, that there 
was a real systematic line of division between the Upper Silu- 
rian and the Cambrian and Lower Silurian, at the base of the 
Mayhill Sandstone and over the Caradoc Sandstone—the May- 
hill Sandstone, which we first defined and demonstrated to have 
Upper-Silurian fossils only, and the true Caradoc Sandstone full 
exclusively of Lower-Silurian or Cambrian types,—the previous 
confusion of these two sandstones, from the erroneous mingling 
* It is worthy of remark that as on the continent of Europe the Devonian 
genus Pleurodictywm has now been found in Silurian strata, so in those 
beds in Victoria I find a new species (P. megastoma, M‘Coy), with cells 
half an inch in diameter. 
Ann. & Mag. N. Hist. Ser. 3. Vol. xx. 14, 
