R. Lydekker— Notes on Dinosaurian Remains. 353 
owner of this vertebra had an arched and comparatively elongated 
neck ; the whole facies of the specimen being essentially Dinosaurian. 
Moreover, in the deep median incisions between the pre- and post- 
zygapophyses the specimen resembles the cervicals of many of the 
Theropoda; while a longitudinal fissure on the right side of the 
centrum is highly suggestive of the crushing in of an internal cavity. 
That the specimen does not belong to the Celuride is quite clear ; 
and I am inclined to regard it as indicating a Dinosaur more or less 
closely allied to the Anchisauride, although, in the absence of figures 
of the typical American forms, it is at present impossible to institute 
any exact comparison. ‘The especial interest of this specimen is the 
evidence which it affords as to the path by which the generic types 
of Dinosaurs common to the old and new worlds may have passed 
from the one hemisphere to the other. 
Arctosaurus Osborni. Right lateral (A), neural (B), posterior (C), and anterior 
(D) aspects of an imperfect cervical vertebra ; from Bathurst Island. Nat. size. 
(From the Proc. R. Irish Academy.) 
2. ORINOSAURUS CAPENSIS, 0. Sp. 
In describing certain Dinosaurian remains from the Karoo 
System of the Cape in 1867, Prof. Huxley (Quart. Journ. Geol Soc. 
vol. xxiii. p. 5) applied the name Orosaurus to a large bone which 
he regarded as the distal extremity of a femur, and considered to be 
generically distinct from the other specimens described in the same 
paper under the name of Huscelesaurus. This bone has been recent 
presented by its describer to the British Museum (No. R. 1626), 
and after careful examination I am convinced that it is really the 
DECADE I1I.—VOL. VI.—NO. VIII. 23 
