PERFORATING BODIES FROM LOWER PALAEOZOIC ROCKS — ETHERIDGE. 121 
On Two ADDITIONAL PERFORATING BODIES, believed 
to be THALLOPHYTIC CRYPTOGRAMS, from the 
LOWER PALAEOZOIC ROCKS of N. S. WALES. 
By R. Etheridge, Junr., Curator. 
(Plate xxiii.) 
In 1891 I described* * * § a perforating Thallophyte under the name 
of Palceachlya tortuosa , occurring in the tissues of a Permo-Car- 
boniferous Monticuliporoid from Queensland, and an Endophytic 
form, then believed to be allied to the Saprolegnian Fungi, met 
with in the old visceral cavities of another coral (Stenopora crinita , 
Lonsdale) from rocks of the same age in New South Wales. The 
latter was termed Palceoperone endophytica. 
For the first of these minute and interesting fossils 1 used the 
late Prof. P. M. Duncan’s genus Palceachlya, f proposed by him 
for the reception of certain supposed fungal borings detected in 
the corallums of Tertiary and Palaeozoic corals, particularly 
Goniophyllum pyramidale and Calceola sandalina. 
The recent examination of a well preserved Favosites , from the 
Devonian Limestones of the Tamworth District, has revealed the 
presence of two highly interesting perforating forms, one of which 
is, in all probability, allied to P. tortuosa , while the other is cer- 
tainly quite distinct. The second being much the more important, 
will be described first. 
The tissues of the Favosites are penetrated in various directions, 
but, more commonly by far, at right angles to the coral’s growth, by 
longer or shorter chains of moniliform cells (PI, xxiii., fig. 1), rather 
similar to a chain figured]; by Prof. P. M. Duncan in the tissues of 
Goniophyllum . These lines of monillse divide at irregular distances 
apart, either at an acute or obtuse angle, as the case may be, but 
no inosculation, contortion, or returning on themselves occur, 
although there is a certain amount of curvature. To use an 
expression of Prof. P. M. Duncan’s, the chains “ often dip out of 
and come within the focus of the microscope, in their more or less 
long course.”§ At times they are widely separated, at others 
crowded together, the calibre of both the parent portions and 
branches being practically the same, the offshoots being quite as 
* Rec. Geol. Surv. N.S.W., ii., 3, 1891, p. 95. 
f Quart. Journ. Geol. Soc., xxxii., 1876, p, 210. 
X Quart. Journ. Geol. Soc., xxxii., 1876, pi. xvi, fig. 9. 
§ Proc. Roy. Soc., xxv., 174, 1876, p. 243. 
