349 Dr. W. F. Hume and others— 
Western Sinai in connexion with the petroleum research programme 
of the Egyptian Government, the object being to obtain the fullest 
details possible as regards the stratigraphy and structure of the 
region, with the question of the indications of petroleum in the fore- 
front of the research. The writer had hoped to have personally 
examined some interesting portions of this area, but other field 
duties intervened. Nevertheless, he was enabled during the early 
days of May, 1920, to visit that portion of the region in which these 
newly discovered formations are best developed. M. Fourtau kindly 
prepared a programme which would enable the writer, with 
Messrs. Moon and Sadek, to obtain a broad view of the northern 
series of ridges (Gebels Risan El Aneiza, Mistan, Lagama, the main 
Maghara range), the party crossing Sinai from El Arish to Ismailia. 
The characters of the Risan El Aneiza massif were practically 
unknown, and the party subdivided itself during the course of the 
examination. On reuniting in the evening it was found that 
interesting results had been obtained. Fourtau, following the 
southern boundary of the hills, had found Jurassic strata in Ras 
Jehan, while Sadek discovered beds of the same age in the centre of 
the range, forming part of a faulted-in region to the east of Ras El 
Ahmar. The writer was accompanied by Sheikh Shehata (brother 
of the head sheikh of the Terrabin), who, under M. Fourtau’s influence, 
had become a keen and discriminating collector. While examining 
the Ras Ahmar ridge, the Sheikh was observed busily at work, just 
below the summit, and, on joining him, the writer had the satisfaction 
of meeting old Lower Greensand friends from the Isle of Wight, such 
as Terebratula sella and a typical species of Gervillia. Later in the 
day a ridge was visited which yielded a typical Aptian fauna, the 
research closing with the discovering of Albian (Gault), crowned by 
the Cenomanian known to be present here at the western end from — 
Barthoux’s researches. Thus it may now be stated that the Jurassic 
and Lower Cretaceous rocks are typically represented in this north- 
eastern extension of the Maghara fold. 
The party subsequently studied the typical exposures of Jurassic 
and Lower Cretaceous age in the Mistan, Um Mafruth, Lagama, and 
Maghara hills, type examples of the whole series being examined in 
turn. Thus were seen the Ammonite beds of the Bajocian series 
bordering the east side of the Wadi Maghara, the Bothryopneustes 
beds, and those rich in Rhynchonella Orbignyi of the Callovian, the 
Collyrites bicordata bed of the Oxfordian and the representative of the 
Coral Rag. The Lower Cretaceous beds were most strikingly dis- 
played in the neighbourhood of Bir Lagama, and from thence the 
succession traced over the pass of Aseifer into the valley to the north 
of Gebel Mandur. Species of Puzosia seemed the commonest 
cephalopoda at the base of the series, accompanied by numerous 
species of T'rigonia (TL. Picteti Coq. T. pseudo-crenulata Nétling). 
M. Douvillé considers that certain of the limestones with fine 
ferruginous oolites from Bir Lagama have furnished a certain number 
