684 
DR W. T. GORDON ON CAMBRIAN' ORGANIC REMAINS 
clusters of bifurcating tubules referable to the Algse often occupy the greatest bulk 
of the rock. Indeed, it would more properly be called an algal limestone containing 
Archseocyathinae, etc. More important than the shell and trilobite fragments are 
spicula probably referable to the Porifera. They are not abundant, nor are they 
well preserved, but they' compare very well with similar spicules from the Beardmore 
Glacier moraines, as will be seen later. 
Detailed Description of the Specimens. 
PLANTS. 
Algse. 
Epiphyton, Bornemann, 1886. 
Epiphyton fasciculatum, Chapman. 
1910. Solenopora? Priestley and David, “Notes on British Antarctic Expedition, 1907-9,” pp. 775-777, 
tig. 7, Compte Rendu du XI e Gong. Geol. Inter. Stockholm. 
1914. Epiphyton flabellatum, Chapman, David, and Priestley, Report of the British Antarctic Expedition, 
“Geology,” vol. i, p. 241. 
1916. Epiphyton fasciculatum, Chapman, Report of the British Antarctic Expedition, “ Geology,” vol. ii, 
pp. 81-83. 
The most common fossil in the material consists of clustered groups of small 
radiating and bifurcating tubules (PI. I, fig. 4, a). In transverse section the tubules 
are circular and sometimes closely adpressed. As a result a typical section is very 
similar to that shown in PI. I, fig. 16, and the identity of this form with that figured 
by Priestley and David from the Beardmore Glacier moraines is apparent when we 
compare this figure with that published by these authors under the name of a 
“ Solenopora-like organism.” A close examination of their figure shows that the 
tubules bifurcate, and a similar phenomenon is clearly indicated in the present 
material (PI. I, figs. 3, 4, and 4a). In the last two figures, at a, repeated dichotomy 
of the thallus and the swollen ends impart a distinctly fucoid appearance to the 
whole. Indeed, the algal form of this type is much more pronounced than in any 
Solenopora. The nearest approach to the form is probably Ortonella, as described 
by Professor Garwood from the Carboniferous Limestone of North-West England. 
Chapman has examined the material from the Beardmore Glacier in more detail, 
and in the Report of the British Antarctic Expedition, 1907-9 (“Geology,” vol. i, 
1914), has correlated it with Epiphyton flabellatum, Bornemann ; but in a later 
contribution (“Geology,” vol. ii, 1918), has described it under a new specific name, 
E. fasciculatum, and given three figures. These figures are not very good, but the 
description and measurements leave no doubt but that the form recorded here is 
identical with the Beardmore Glacier type. 
