134 Geological Society. 
to the Hydromeduse. A satisfactory classification of the Antho- 
and Leptomedusz is not, it is insisted, at present possible. 
The section on the Anthozoa has been written by Mr. G. C. 
Bourne ; and certainly no one else is better qualified for this task. 
His account of the Ctenophora is interesting. The supposed 
Planarian affinities of Ctenoplana and Coeloplana Mr. Bourne views 
with disfavour. Again, Mr. Bourne joins issue with Dr. Willey 
concerning the claim of the Ctenoplana and Cceloplana to be regarded 
as primitive forms. We have no evidence, Mr. Bourne contends, to 
show whether they are primitive or derived forms. 
The illustrations are numerous and well executed. A large number 
are original. Some of these are drawn by the authors themselves, 
Those by Prof. Minchin and Mr. Bourne are especially good. 
Many of those illustrating the external forms of sponges are by 
Mr. P. J. Bazand, and are really excellent. 
PROCEEDINGS OF LEARNED SOCIETIES. 
GEOLOGICAL SOCIETY. 
February 21st, 1900.—J. J. H. Teall, Esq., M.A., F.R.S., 
President, in the Chair, 
The following communication was read :— 
‘Further Evidence of the Skeleton of Hurycarpus Owent.’ 
By Prof. H. G. Seeley, F.R.S., F.L.S., V.P.G.8. 
The original specimen from which this species was named wag 
obtained from the Sneewberg (South Africa) in 1876, and after being 
doubtfully referred to Dicynodon was described and figured in 1889, 
It was presented to the British Museum by Mr. Thomas Bain, through 
Sir Henry Barkly. The skull was found with the complete spe- 
cimen, and a short memorandum of its characters, with a sketch of 
the skeleton, including the skull, was made by Mr. T. Bain and has 
been preserved in the British Museum. Half of the counterpart of 
the slab was presented to the Author by the Rev. C. Murray, and 
by means of it complete casts of part of the skeleton have been 
obtained. 
From Mr. Bain’s sketch the Author is able to give some account 
of the skull, including its dimensions. From the material men- 
tioned above, he gives new facts with regard to the vertebral 
column, the ribs, the shoulder-girdle, the fore-limb, the hind-limb, 
and the armour, which was present upon the limbs and the fore 
part of the body. 
The locality from which the animal was obtained had already 
