302 R. Lydekker—WNotes on Dinosaurian Remains. 
degree of influence of the same kind dependent on the subordinate 
relief of the country passed over. 
PRG Approximate Approximate Height Direction 
° Latitude. Longitude. in feet. (true bearings). 
High Plateau between N. 
Thompson and Bonaparte | IRIE Ley ehh RAIN? Biey 4340 § 20° 
Rivers. ean became Pe se 
a me a 51° 4’ | 120° 45’ 5100 § 34° E 
i ab 35 51° 9’ | 120° 26" 5430 S37°E 
* 50° 59’ 120° 25’ 5440 S 35° E 
Tod Mountain ais 50° 56’ 119° 55’ 7200 S 44° H 
High Plateau between Ndaras ay olan ° 
ci Secs } 51° 1’ | 119° 41 6100 S 27° E 
Cinder Mountain. ... ... 50° 34’ NOW By 5180 S 50° E 
Loadstone Peak... ... ... 49° 25’ 120° 50’ 6280 8 15° E 
IV.—Norsrs on New AnD oTHER DINOSAURIAN REMAINS. 
By R. Lyprexxer, B.A., F.G.S8., F.Z.S., ete. 
N the present communication I call attention to a Reptilian vertebra 
which does not appear to have received the notice it deserves, 
and also give a preliminary diagnosis of certain forms which I hope 
to describe more fully later on. 
1. Arctosaurus Ossorni, Adams. 
In the year 1875 the late Professor Leith Adams described and 
ficured in the “ Proceedings of the Royal Irish Academy” (ser. 2, 
vol. ii. p. 177) an imperfect Saurian vertebra which had been ob- 
tained many years previously from Arctic America during the voyage 
of Captain Sherrard Osborn, which is now preserved in the Museum 
of Science and Art, Dublin. The specimen was obtained from beds 
of unknown but doubtless Mesozoic age at Rendezvous Mountain, 
which is situated at the north end of Bathurst Island in 70° 36’ north 
latitude. 
By the courtesy of Prof. V. Ball, Director of the Science and Art 
Museum, Dublin, I have recently had an opportunity of examining 
this interesting specimen, of which, by permission of the Royal Irish 
Academy, I am able to reproduce the original figure. In his original 
description of the specimen, which has suffered by lateral crushing 
and is otherwise imperfect, Prof. Adams considered that it indi- 
cated a cervical vertebra, which had lost the neural spine, the costal 
articulations, and the right prezygapophysis. And he then proceeds 
to give his reasons for regarding it as more nearly allied to Lizards 
than any other reptiles. 
My own observations confirm the conclusion that this vertebra 
belongs to the cervical region; but it appears that its affinities are 
certainly Dinosaurian. The centrum is compressed and amphiccelous, 
with a sharp hemal carina; and it is evident that there were free 
cervical ribs and a well-developed neural spine. The highly curved 
ventral profile and the length of the centrum indicate that the 
ws 
