On Cryptoxylon Forfarense. 363 
that it is algoidal. We have very little intimate knowledge 
of the Land Plants of Devonian Age, and it seems quite 
possible that Cryptoxylon may be the stem of some primeval 
form of terrestrial vegetation. I do not, however, feel myself 
in a position to offer any satisfactory opinion on the affinities 
of this interesting fossil, so must leave that question an 
open one. 
My thanks are due to Sir Archibald Geikie, F.R.S., etc., 
for kind permission to describe the specimen. 
EXPLANATION OF PLATES. 
Plate VIII. 
Cryptoxylon Forfarense, Kidston. 
. Specimen showing outer surface ; nat. size. 
. Transverse section ; nat. size. 
. Transverse section; x 22. 
. Longitudinal section ; x 22. 
"a 
me OR 
a SO 
Plate IX. 
5. Transverse section, cellular matrix; x 75. 
6. Transverse section, group of smaller cells; x 75. 
Fig. 7. Transverse section, group of smaller cells; x 75. 
8. Longitudinal section, group of smaller cells; x 75. 
Note.—-All the above figures are from photographs. 
XXVIIL. A Catalogue of Recent Cephalopoda. Supplement, 
1887-96. By Wituram Evans Hoyzz, M.A.(Oxon.), 
F.R.S.E., Keeper of the Manchester Musuem, Owens 
College. 
(Read 21st April 1897.) 
Eleven years ago the Royal Physical Society did me the 
honour of publishing a list of the species of recent Cephalo- 
poda, as complete as I could make it, up to that date The 
decennium which has since elapsed has witnessed the issue 
of several important memoirs on this group of animals, as 
well as the usual number of scattered papers. For the 
purpose of my own studies, I have found it necessary to 
keep this Catalogue up to date, and it has occurred to me 
1 Proce, Roy. Phys. Soc. Edin., vol. ix., pp. 205-267, 1886, 
