310 F. Chapman — Tertiary Foraminifera 



Jebel Abyad, Sinai." ? Bartonian (Upper Eocene) or ? top of 

 Mokattam Series (Middle Eocene). 



A soft-textured, pale cream-coloured rock. Thin sections of this 

 specimen when viewed under the microscope show the rock to 

 be finely granular to crystalline, and to contain a fair number of 

 foraminifera, some of which are broken and worn (? derived). 



The foraminifera in this rock are : — Glohigerina biilloides, d'Orb. ; 

 Operculina complanata (Defr.), var. dtscoidea, Schwager ; Nummulites 

 planulata (Lamarck) ; N.variolaria (Lam.) ; and Orhitoides dispansa 

 (Sowerby). 



Nos. 4,135, 31, and 4,113, 4:Z. — " Foraminiferal limestone ; junction 

 of Wadi Baba and Wadi Shellal." Libyan Series (Lower Eocene). 



This rock has a whitish chalky appearance, and is seen imder the 

 microscope to be almost completely recrystallized as dolomite, the 

 rhomb-sections of that mineral being very perfect. The foraminifera 

 have retained generally their shape and structure, but in many 

 instances their tests are bitten up by dolomite rhombs. The 

 chambers of the foraminifera are also often filled up by the crystals. 

 Besides foraminifera numerous fragments of polyzoa (unaltered) 

 are scattered throughout the rock. 



The foraminifera seen in these specimens are : — Textularia agglu- 

 tinans, d'Orb. ; Operculina complanata (Defr.), var. canalifera, 

 d'Archiac ; and Nummidites Ramondi, Defr. 



No. 4,163, 51 — "Nummulites near top of Jebel Safariat, Sinai." 

 Mokattam Series (Middle Eocene). 



A collection of nummulites of the type N. complanata, comprising 

 N. Gizehensis (Forskal), var. Ehrenbergi, De la Harpe ; iV. Gizehensis, 

 var. Lyelli, d'Archiac & Haime ; and N. Gizehensis, var. Fachoir 

 De la Harpe. 



No. 3,698, 13Z. — " Nummulitic bed, Wadi Khadahid, Sinai." 

 Mokattam Series (Middle Eocene). 



An ochreous - coloured, incoherent limestone, consisting almost 

 entirely of nummulites (chiefly N. curvispira). 



The following foraminifera were found : — Truncatulina umhonifera 

 (Schwager) ; Nummidites Gizehensis, var. Pachoi, De la Harpe ; 

 N. curvispira, Meneghini ; N. Barroni, sp. nov. ; and N. Bamondil, 

 Defrance. 



No. 3,903, \5l. — " Foraminifera! limestone, Jebel Krer (same 

 range as Jebel Abyad), Sinai." Libyan Series (Lower Eocene). 



An impure chalky limestone, with many included fragments of an 

 older rock, possibly Cretaceous in age, which includes Glohigerina 

 cretacea ?, d'Orb. When viewed microscopically, this limestone 

 appears to have originally been a fine-grained calcareous mud, with 

 numerous specimens of foraminifera. We find here Miliolina circu- 

 laris (Born.); Alveolina Boscii (Defr.); A. decipiens, Schwager; 

 Bigenerina'} nodosaria, d'Orb. ; Glohigerina cretacea ?, d'Orb. ; Opercu- 

 lina complanata (Defr.), var. canaliculata, d'Archiac; Nummulites 

 Guettardi, d'Arch. & Haime, var. antiqua, De la Harpe ; Orhitoides 

 dispansa (Sow,); and 0. papyracea (Boubee). 



