1914-15.] Fossil Micro-organisms. 113 
Of the ten species which are here mentioned, three only are described 
with sufficient fullness to merit the bestowal of both generic and specific 
names. These are Haplograpliites cateniger, Haplographites xylophagus, 
^nd Gladosporites hipartitus. These are described and measured with a 
fair degree of fullness. In the absence of fuller information it would have 
been better to have assigned a provisional nomenclature to the remaining 
seven. The term Palceomyces suggested by Seward (9) is sufficiently com- 
prehensive for the inclusion of such organisms. 
An interesting case of a Mycorhiza from the Lower Coal Measures is 
described by Weiss (12). The fungus in this association is made up of a 
number of mycelial threads, attached to which are a number of pear-shaped 
bodies apparently at the ends of the hyphae. Some of these vesicles show 
homogeneous contents, and in one or two cases Weiss found structures 
which suggested spores, but he was not able to speak with certainty on 
the matter. Pending further knowledge of this fossil fungus he has named 
it Mycorhizonium. So far as I have been able to obtain information, we 
possess moderately complete accounts of the following fossil fungi : — 
1. Peronosporites antiquarius (Worthington Smith). 
2. Oochytrium Lepidodendri (Renault). 
3. Haplographites cateniger (Felix). 
4. „ xylophagus (Felix). 
5. Gladosporites hipartitus (Felix). 
The organism which is here described should add a sixth to this list. 
(6) All the fossil fungi mentioned above were found in the cells of 
plant tissues that were in a rotting condition when the fossilising processes 
were initiated. The organism here described was found in the famous 
Frodingham Ironstone of Lincolnshire. The Frodingham ore belongs to 
the upper part of the Lower Lias. Kendall (3) gives the following in- 
formation which was gained by the sinking of a shaft near Appleby : — 
Upper 
part of 
r Shale with cement-stone nodules 
Ft. 
67 
In. 
6 
Zone. 
A. capricornus. 
Ironstone ..... 
4 
6 
A. armatus. 
Blue shale ..... 
89 
9 
A. raricostatus. 
Lower 
Lias. 
Ironstone ..... 
( Frodingham main bed 
22 
6 
A. Semico status. 
The Frodingham ore is distinctly bedded, layers of ferruginous lime- 
stone alternating with ironstone. In places the ore is oolitic, and through- 
out organic remains, chiefly Echinoderm shells, are very abundant. The 
■organism was obtained from four different parts of the same bed, and in 
VOL. XXXV. 8 
