Barber . — On Nematophycus Storriei , nov. sp. 333 
examination of the specimens and a perusal of the descriptions 
of Professor Penhallow and Mr. Carruthers. The plates illus- 
trating the former paper are unfortunately of little use, and 
those drawn by Mr. Carruthers in the Monthly Microscopic 
Journal, October 1, 1873, form at present the only reliable 
illustrations of this fossil. I have, accordingly, prepared a few 
figures exhibiting the main points of structure under dis- 
cussion, so that the difference between the present plant and 
N. Storriei will be rendered more evident. 
The summary of the structure of N. Logani given above 
represents the present state of our knowledge on the subject. 
Although, in the main, I am perfectly convinced of the cor- 
rectness of Professor Penhallow’s description, there are several 
points on which I am not so well satisfied, and which I shall 
discuss in the sequel. I am not quite content, for instance, to 
regard the spaces as functionally branching depots for the 
junction of larger and smaller tubes. No single instance have 
I seen of a ‘ large tube ’ being connected with a ‘ small tube.’ 
Both the larger tubes and the smaller undoubtedly branch, 
and the smaller tubes appear to be divided by transverse 
walls. 
Nematophycus Storriei, nov. sp. 
The pieces of this fossil, on which the present description is 
based, were all obtained by Mr. Storrie from the Tymawr 
quarry, near Cardiff, and prepared for the microscope by the 
same gentleman. 
The beds in that quarry, as already noted, are considered 
by Professor Sollas to belong to Wenlock 1 age 2 . The frag- 
ments of fossilized wood occur as small, broken, waterworn 
bits, imbedded in a crumbling argillaceous matrix, with accom- 
panying specimens of Pachytheca. The stems of N. Logani , 
on the other hand, are described as occurring in great blocks 
much resembling the massive trunks of Carboniferous age. 
1 Annals of Bot., v. 146. 
2 Sollas, on the Silurian District of Rhymney and Pen=y-lan, Cardiff: Quart. 
Journ. Geol. Soc., xxxv. p. 475, 1879. 
