Vol. 67.] FORAMINIFERA, ETC. FROM CYRENAICA. 655 



' Ain Seghia — Wadi Derna ' (No. 22). A pink limestone with 

 large and well-preserved individuals of N'ummulites ehrenbergi De 

 la Harpe, and N. curvispira Menegh. The former measures nearly 

 5 centimetres in diameter. 



Horizon. — Middle Eocene. 



' Foraminiferal limestone about 340 feet above sea-level, above 

 Bint, east of Derna ' (No. 28). A pale yellowish limestone, somewhat 

 friable, containing numerous small organisms, chiefly foraminifera. 

 A crushed sample yielded the following species : — 



near Cairo, by Schwager, under the 

 name of Pulvinulina mokattamensis. 



Anomalina ammonoides (Reuss). 



A. insecta Schwager. 



Pulvinulina repanda (F. & M.). 



P. elegans (d'Orb.). 



Polystomslla striatopunctata (F. & M.). 



Miliolina contorta (d'Orb.). Several 



specimens. 

 3£. lucens Schwager. Numerous. 

 M. ferussaci (d'Orb.). One minute 



example with few, neat coils. 

 Polymorphina compressa d'Orb. 

 Truncatulina culter (P. & J.). 



Tr. lobatula (W. & J.). j Operculina libyca Schwager 



Tr. ungeriana (d'Orb.). Recorded from N'ummulites curvispira Menegh. 



the Middle Eocene (Mokattam Marl), I 



Horizon. — Middle Eocene. 



' Wadi Nagr, first camp west of Derna' (No. 39). A white, some- 

 what chalky limestone, containing abundant, more or less frag- 

 mentary tests of OrtJiophragmina pratti (Mich.) [see Notes, p. 659]. 

 Operculina and Nummulites, with numerous echinoid-fragments, 

 are also present. 



Horizon. — Bartonian (Upper Eocene) or Lutetian (Middle 

 Eocene). 



' Slope above Camp at Wadi Nagr, Derna ' (No. 44). A pink 

 limestone, composed of Litliothamnion and foraminifera. In thin 

 section this rock is seen to consist of numerous fragments of a 

 thick shrubby Litliothamnion. with an equal proportion of tests of 

 nummulites, chiefly N. curvispira ; also tests of smaller foraminifera 

 such as Truncatulina, and fragments of echinoicl-tests and spines, 

 embedded in a subcrystalline matrix. The pieces of Litliothamnion 

 are invariably more or less crowded with small, stout, rhombic 

 dolomite-crystals, often showing a dark centre and zonal structure. 



Horizon. — Middle Eocene. 



Wadi Umzigga. 



' Limestone with Oopecten ; Wadi Umzigga ' (No. 41). A 

 weathered limestone-fragment consisting almost entirely of the tests 

 of Lepidocyclina elepliantina Munier-Chalmas (see Notes, p. 660). 

 A few rotaline foraminifera are seen scattered through the matrix, 

 and also some tubular remains of (?) calcareous algoe. 



Horizon. — Aquitanian (Lower Miocene) or Stampian (Upper 

 Oligocene). This horizon is given on the excellent authority of 

 M. Douville. 



