OF THE FOSSIL PLANTS OF THE COAL-MEASURES. 
305 
of the sporangiophores, v, at which they are organically united to the 
sporangia. Enlarged 36 diameters. 
Fig. 24. Oblique longitudinal section through a strobilus exhibiting both macrospores 
and microspores. Enlarged 18 diameters, k. Central axis. t. Barren 
bractigerous disks. t'. Bracts of t. v. Sporangiophores of the fertile 
verticils, u. Sporangia with microspores, u . Sporangia with macrospores. 
Fig. 25. A microspore of fig. 24, u, enlarged 165 diameters. 
Fig. 26. A macrospore of fig. 24, u, enlarged 165 diameters, a. Exosporium. b. En- 
dosporium. c. Central mass of carbonised matter. 
Fig. 27. Portions of the margins of three barren disks, t, showing the ascending 
marginal bracts t'. Enlarged 15 diameters. 
Carboniferous Fungi. 
Fig. 28. Peronosporites antiquarius from Halifax, a. Hyphse. b. Oogonia. c. Cells 
of a fragment of bark. Enlarged 375 diameters. 
Figs. 29, 30, 31, 32, 33. Various fragments of the same from a specimen from Oldham. 
Enlarged 500 diameters. 
Fig. 34. Fragments of a Fungus with smaller liyphse from Halifax. Enlarged 675 
diameters. 
PLATE 48. 
Fig. 35. Fragments of a Fungus with smaller hyphen from Halifax. Enlarged 675 
diameters. 
Fig. 36. Peronosporites antiquarius , Oldham specimen. Enlarged 320 diameters. 
Figs. 37, 38. Peronosporites antiquarius, Halifax specimens. Enlarged 320 diameters. 
During the progress of the investigations recorded in my eleven memoirs I have 
experienced some difficulties which would not have been felt if I could have examined 
the originals of the figures and descriptions left by my predecessors in this study. 
Those who may follow me in these enquiries may be preserved from similar difficulties 
by knowing that most of the specimens which I have described will find their perma¬ 
nent resting-place in the Geological Museum of the Owens College, Manchester, where 
they will be accessible to all who may require to consult them. 
Manchester, Jan. 23, 1881. 
w. c. w. 
