344 Dr. W. EF Hume and others— . 
of cephalopods which are definitely of Barremian age (equivalent 
roughly to the Atherfield clay of the Lower Greensand in England 
and higher than the Neocomian). These include species of Lytoceras, 
Costidiscus, Phylloceras, Desmoceras, and Crioceras. The beds with 
which the writer became acquainted are, however, frankly Aptian 
(Lower Greensand), and as stated above contain species of Puzosia 
(P. Matheront d@Orb, P. Anglader, Sayn), and of Dowvilleiceras 
(D. Meyendorfir [Sinzow]). Nautilus Lalliert d’Orb. is also abundant. 
A familiar British fossil found in these beds is Terebratula sella 
Sowerby. ; 
As we mounted the pass, the series was followed in ascending 
succession by beds with an abundant Hchinoconus and large 
Gasteropoda. A layer containing small ferruginous ammonites also 
attracted our attention. At a point where the pass steepens, and the 
path takes a sharp turn, are strata very rich in a beautiful variety 
of simple coral, Trochocyathus sp., etc. These beds M. Fourtau 
regards as typically Albian (Gault). At the summit of the pass are 
beds crowded with a foraminifer, Orbitolina cf. concava Lam. 
Finally, in the descent, the typical Hxogyra flabellata was met with, 
indicating the presence of the Cenomanian formation already so 
familiar in other portions of Egypt and the Sinaitic peninsula. 
M. Fourtau had kindly prepared the following notes for inclusion, 
these giving further details as to the character of the Jurassic 
strata in the Maghara area. 
“The Lower and Middle Jurassic are very well represented at 
Maghara, but in consequence of the sedimentation having been 
continuous and there being both recurrence of faunas and of facies, 
it is difficult to determine the precise limits of the different horizons, 
Bajocian, Bathonian, Callovian, and Oxfordian. 
‘““ The Bajocian is poor in fossils, and its lower boundary with the 
grits difficult to define, so that one may regard the basal grits of 
the central dome of Maghara as possibly Liassic, though they might 
equally represent the earliest strata of the Inferior Oolite. The 
limestones are in general grey or blackish, and some of the beds are 
highly oolitic. The sea-urchin fauna is poor but characteristic. 
Stomechinus bigranularis Link, Pygaster cf. semisulcatus Ag., 
Rhabdocidaris coploides Ag. and at the top, Holectypus depressus 
Leske. The Brachiopods are represented by special forms of 
Terebratula, the Parathyris of Douvillé with Zeilleria subbucculenta 
Chapuis and Devalque. The Cephalopods are especially species of 
Celoceras. As regards the Lamellibranchs, these are mostly rare, 
with the exception of a Nucula related to N. tenwistriata Sow. 
“M. Douvillé places an Ammonite horizon in the Bajocian, 
following Barthoux in calling this the yellow limestones. These 
beds appear to us to have their place better at the base of the 
Bathonian, as they contain certain fossils more or less characteristic 
of that formation, such as Hudesia cardium Link, Terebratula 
quillyensis Bayle, and Rhynchonella Orbignyi Oppel. It is to be 
