Vol. 67.] FORAMINIFERA, ETC. FROM CYRENAICA. 661 



Length = *725 millimetre : height = -4 mm. ; thickness of 

 carapace = -325 mm. 



Remarks. — The carapace of this species is somewhat like that 

 of L. tamarindm (Jones), 1 in outline, viewed from the side ; but 

 the form here described is much thicker posteriorly, and has the 

 anterior border distinctly acuminate. 



Horizon. — Middle Eocene at Wadi Xagr, west of Derna 

 (No. 33). In a compact subcrystalline limestone, slightly iron- 

 stained; mainly composed of the large tests of Nummulites gize- 

 Tiensis Ehr. (one having a diameter of 5*5 centimetres), and 

 N. curvispira Menegh. 



CrxHERE striatopunctata (Romer). 



Frequent. A common species in the Middle Eocene of England 

 and the continent of Europe. 



Horizon. — Middle Eocene. Wadi Xagr, west of Derna (on 

 No. 33). 



? Ctthere wetherelli Jones. 



One valve in a marly limestone (No. 187), from east of Ain 

 Sciahat, which contains Opercidina libyca Schwager, Bolivian 

 textilarioides Reuss, and Pulvinulina Icarsteni Reuss. It belongs 

 doubtfully to the genus Cythere, and resembles Cy there wetherelli 

 Jones 2 in many respects, although it is not quite identical. The 

 latter form is found in the Upper Eocene and Oligocene of Col well 

 Bay and the Upper Eocene of Barton. Also in the Antwerp Crag 

 (Lower Pliocene). 



(D) The Eossil Echinoidea of Cyrenaica. By John Walter 

 Gregory, D.Sc, E.R.S., F.G.S., Professor of Geology in the 

 University of Glasgow. 



[Plates XLYII-XLIX.] 



The specimens were collected during the expedition of which the 

 geological results have been recorded in the foregoing pages 

 (572-615). The fossil Echinoidea collected in Cyrenaica during 

 our journey include ten determinable species represented by over 

 a hundred specimens. Many of them are imperfect, but were col- 

 lected on account of the light which they might throw on the 

 distribution of the species. 



I have to express my thanks to Dr. F. A. Bather for having 

 kindly compared some of the specimens of EcTiinolampas with 

 specimens in the British Museum collection, and to M. J. Lambert 



1 Cytherideis tamarindus Jones. ' Monogr. Brit. Tert. Entom.' (Pal. Soc.) 

 1857, p. 49 & pi. iii, figs. 4a-4 h ; Loxoconcha tamarindus (Jones) G. S. Brady, 

 Trans. Linn. Soc. vol. xxvi (1868) p. 435 & pi. xxr. figs. 45-48. 



2 Q. J. G. S. vol. x (1854) p 161 & pi. iii. figs. 9o-9h. 



