/;/ Limestones from Sinai. 313 



Schwager fouucl G. bulloides in both the Libyan and the Mokattam 

 Series in Egypt. 



Coll. Geol. Snrv. Egypt, No. 4,112, Box No. 21. Bartonian Series 

 (Upper Eocene) or top of Mokattam Series (Middle Eocene) : Jebel 

 Abyad, Sinai. 



Globigerina conglohata, Brady, (PI. XIV, Fig. 6.) 



Globigerina conglohata, Brady, 1879 : Quart. Jouru. Micro. Sci., vol. xix, p. 72. 

 Id., 1884 : Eep. Chall., vol. ix, p. 603, pi. Ixxx, figs, l-o ; pi. Ixxxii, 



tig. 5. 



This species is occasionally seen in the sections of No. 4,111, but 

 the specimens are somewhat fragmentary. It has previously 

 occurred in beds as old as the Oligocene or Miocene, notably in 

 the limestones of Christmas Island. It is distinguished by the 

 fewness of the chambers and the comparative thickness of the 

 shell-walls. 



Coll. Geol. Surv. Egypt, No. 4,111, Box No. IZ. Mokattam Series 

 (Middle Eocene) : top of Jebel Abyad, south of Wadi Gharandel, 

 Sinai. 



Globigerina cretacea ?, d'Orbigny. (PL XIV, Fig. 7.) 



Globigerina cretacea, d'Orb., 1840 : Mem. Soc. geol. France, ser. i, vol. iv, p. 34, 



pi. iii, figs. 12-14. 

 G. cf. cretacea, d'Orb., Schwager, 1883 : PalseontograpMca, vol. xxx, Pal. Tlieil, 



p. 119, pi. xxix, figs, iia-d. 



Numerous small specimens of a small-chambered, neatly coiled 

 Globigerina, very closely resembling G. cretacea, occur in the pre- 

 sumably oldest nummulitic beds of Sinai. This species has also 

 been doubtfully referred to as occurring in the argillaceous beds 

 (Libyan Series) of El-Guss-Abu-Said by Schwager. 



It is of great interest to note this occurrence here, since if the 

 species be proved by specimens isolated from the rock, they will 

 either have been derived from neighbouring Cretaceous beds or 

 otherwise show an upward range for the species, typical examples 

 of which are not known out of the Cretaceous formations. 



Coll. Geol Surv. Egypt, No. 4,111, Box No. 1/. Mokattam Series 

 (Middle Eocene) : top of Jebel Abyad, south of Wadi Gharandel, 

 Sinai. Also No. 3,902, Box No. 151. Libyan Series (Lower 

 Eocene : Jebel Krer (same range as Jebel Abyad), Sinai. 



Family ROTALIID^. 



Subfamily EOTALIIN^E. 



DiscoRBiNA, Parker & Jones [1862]. 



Discorbina rugosa (d'Orbigny). (PI. XIV, Fig. 9.) 



Rosallna rugosa, d'Orb., 1839 : Voyage Amer. Merid., vol. v, pt. 5, Foramiuiferes, 



p. 42, pi. ii, figs. 12-14. 

 Discorbina rugosa (d'Orb.), Brady, 1884: Eep. Chall., vol. ix, p. 652, pi. Ixxxvu, 



figs. 1, 4. Sherborn & Chapman, 1889 : Journ. Hoy. Micro. Sci., p. 487, 



pi. xi, fig. 33. 

 This neat little shallow- water organism is fairly well known in 

 Eocene strata, and is a characteristic form in the London Clay. 



