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220 Geological Society. 
10 inches wide. It is split so as to expose a portion of the skull, 
the vertebral column and ribs as far as the pelvis, the scapula, part 
of the humerus, the femur, and parts of the tibia and fibula. The 
tail and left hind-limb, and apparently part of the right fore-limb, are 
lost, owing to the jointed condition of the rock. ‘The bones have 
decomposed, and are represented by natural moulds from which a 
beautiful cast was obtaincd by means of a jelly mould in the Geo- 
logical Department of the Natural History Museum, before the speci- 
men was returned to Grahamstown. The remains indicate an animal 
about 2 feet long, exclusive of the tail, and standing probably about 
8 inches high ; it was not more than 6 inches wide in the fore part 
of the body. The animal was of great mobility, capable of casily 
bending the body, and, by straightening the limbs, of occasionally 
raising its height to 10 inches or more. It is a new type of 
Theriodont reptile, contributing important facts to the osteology of 
the group, and especially in regurd to the natural association of the 
bones. It is possibly to be included in the Cynodontia, from which 
it differs in characters of the ilium, scapula, and skull. 
2. ‘Fossils in the Oxford University Museum.—IV: Notes on 
some Undescribed Trilobites.’ By H. H. Thomas, Esq., B.A., F.G.S, 
Two new species of Dalmania from the Wenlock Shales and one 
of Olenus from the Shineton Shales of Shropshire are described in 
this paper. The specimens on which the first species of Dalmania 
is founded were collected by the late Dr. Grindrod at Malvern 
Tunnel. The species has a strong resemblance to certain varieties 
of D. caudatus, especially those more nearly approaching D. longi- 
caudatus; its nearest ally seems to be D. newilis. Among its 
characters are spines round the head, the height of the head-shield, 
and the distance between the eyes. The type-specimen of the 
second species came from the Wenlock Shale of Builth. The 
Shineton specimen was presented to the Oxford Museum by the 
Right Rev. Bishop Mitchinson. 
3. ‘On Radiolaria from the Upper Chalk at Coulsdon (Surpep),, 
By W. Murton Holmes, Esq. ; 
The radiolaria described in this paper were contained in the 
cavities of two small flints which were thrown out of the new 
cutting between Coulsdon Station and the new Merstham Tunnel on 
the L. B. & 8. C. Railway. They were probably derived from the 
zone of Holaster planus. After treatment with hydrochloric acid, 
the material yielded silicified casts of foraminifera as well as radio- 
laria. ‘The surface of the radiolaria is so much altered by corrosion 
that specific identification is in most cases impossible. Twenty 
genera have been recognized, and the organisms appear to belong to 
forty-one species of these genera. A list of the radiolaria is given, 
accompanied by a short description of each form, and four new 
species are described. The Discoidea appear to have the predomin- 
ance, and the species of Dictyomitra come next in numerical order. 
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