THE ANNALS 
MAGAZINE OF NATURAL HISTORY. 
[NINTH SERLES.] 
No. 41. MAY 1921. 
XLVI.—On a Marine Jurassic Fauna from Central Arabia. 
By R. Butien Newrov, I.8.0., F.G.S. 
[Plate XI. ] 
INTRODUCTION. 
A COLLECTION of fossils, the determination of which forms 
the subject of this report, was obtained by Mr. H. St. J. B. 
Philby, C.LE., from Central Arabia, during his remarkable 
traverse of that country in 1918 between the Persian Gulf 
and the Red Sea, while engaged on a Government diplomatic 
mission *, 
These specimens, although of a fragmentary character, 
give interesting evidence of a marine Jurassic fauna which 
presents a relationship with material already described from 
the South-western region of Arabia. 
We appear to be indebted to F. R. Mallet f for our earliest 
knowledge of the presence of Jurassic rocks in Arabia. This 
geologist discovered a certain limestone to the N. of Majhafa 
* For an interesting account of his explorations of a part of this 
journey—with no reference, however, to geological matters—the reader 
is referred to Mr. Philby’s paper on ‘“‘ Southern Najd,” ‘ The Geographical 
Journal,’ 1920, vol. lv. pp. 161-191, with a map of the region. 
+ “On the Geological Structure of the Country near Aden,” Mem, 
Geol. Surv. India, 1871, vol. vil. pp. 257-284. 
Ann. & Mag. N. Hist. Ser. 9. Vol. vii. 27 
