PERFORATING BODIES FROM LOWER PALAEOZOIC ROOKS — ETHERIDGE. 1 23 
of the microscopic sections wherever the chains occur, and often 
well into the sections, among the visceral chambers of the coral, 
a brown pulverulent substance occurs, always very uniform in 
colour ; does this represent the shed contents of the black globules? 
The longest chain observed attained a length of 5 millimetres, 
the diameter of the monillse being *0075 millimetres, and that of 
the black globules '01. 
The second form contained within the tissues of the Favo sites 
consists of ramifying tortuous tubes, with definite walls, spreading 
out, returning on their own parts, bifurcating, or forming confused 
masses (PI. xxiii., fig, 5), They may be filled with a sherry-yellow, 
minutely pulverulent matter, or, they may be quite clear of this sub- 
stance, and only determinable by the presence of the bound ing walls, 
not otherwise differing from the surrounding cal cite of the coral, but 
the outline is very irregular, irrespective of their contorted course. 
In the majority of instances when these tubes are present, the old 
visceral chambers of the Favorites near at hand are more or less 
filled with the sherry -yellow pulverulent matter. This material 
is remarkably like that seen in the perforations of Palceachlya 
; perforans ,* and which Duncan calls tubes “with conidia.” In a 
very few instances I have observed these tubes occupied by patches 
of dense black matter, similar to the black globular cells of the 
previously described form. The tortuous nature of this endophyte 
renders it impossible to speak with any degree of certainty as to 
the length of an individual tube, but the diameter appears to be 
tolerably uniform, viz., -01 millimetres. 
I propose to call this organism Palceachlya torquis , on account 
of its much more irregular course. It is otherwise similar in 
character to, except for smaller dimensions as compared with 
those of P. tortuosa , rnihi. P. tortuosa is distinctly visible 
with a one-inch objective (Watson’s), whereas the tubes in P. 
torquis cannot be distinguished without the aid of the quarter- 
inch objective of the same maker. The diameter of the tubes in 
P. tortuosa is *02 millimetres. 
Similar characters separate P. torquis from the endophyte 
figured, but not named, by Waagen and Wentzel,f in the corallites 
of Geinitziella columnaris , Schl. Duncan’s illustrations of 
Palceachlya perforans convey, in a general way, the appearance of 
the tubes in P. torquis , allowing for the much more irregular 
course of them in the latter, and it may legitimately be concluded 
that, although allied, they are distinct. 
As regards the chains of monilliform cells, the probability seems 
to be that they, and the tubes of P. torquis , represent separate 
# Quart. Journ. Geol. Soc., xxxii., 1876, pi. xvi., fig. 5. 
f Pal. Indica, Ser. xiii., Salt Range Fossils, i., 6, 1886, pi. cxv., fig. 1. 
C 
