vine: carboniferous and permian polyzoa. 
85 
diaracter of the cell division of the leaves on either side 
of the branch of typical Cystodictya (Flustra ?) iKirallela, 
Phill. Mag. about 80 times. 
Fig. 13. Section of another example not quite so transparent as above. 
Plate IV. 
Fig. 14. Goniocladia cellidifera, Etheridge, Jun. One of the smaller 
examples of the species, Yorkshire ; opaque but cut through 
from the reverse side in a line with the axis. Magnified 
about 30 times. 
Fig. 15. An example from Gare, (reverse side), not so deeply cut as 
the above, with rounded Gonocyst. Mag. about 30 diams. 
Fig. 16. Gonocyst of Xo. 15 example, enlarged about 60 times. 
Fig. 17. G. cellidifera forma robiista, Yorkshire. Flattened example 
magnified about 30 times, but slightly restored on the 
right hand margin. This is a true Goniocladia, otherwise 
the figure may be mistaken for a Polypom, as the Zoecia 
on the opposite side are similar to those shown in the figure. 
Reverse compressed. Keel very faint. 
Fig. 18. Yorkshire example of C. iKwallela, showing marginal Gono- 
cyst ; opaque view. As tlie example is unique, I am rather 
doubtful about its internal character. It differs from Scotch 
examples in some respects. 
Fig. 19. Cystodictya parallela, or variety of same, from North 
Lancashire, in which the bars are wavy and finely tuberculated. 
Fig. 20-23. Examples of C. parallela from different localities to show 
mode of branching. 
Fig, 24-25. See text. 
Fig, 26. Gonocyst in the angle of the branches. North Lancashire. 
Fig. 27. Basal markings, see text on the Ccenecium of C. parallela. 
The two shaded parts are cells of the species to which the 
excrescence was attached, 
