236 Reports and Proceedings — Geological Society of London. 



etc., associated with JEquipecten zitteli, JEq. camaretensis, and JEq. 

 scahrellus, which are indicative of the later age — Burdigalian or 

 Helvetian. This admixture of species, according to Dr. Oppenheim's 

 memoir on the ' Schioschichten ', is also known in the fauna of those 

 rocks. Foraminiferal organisms (Operadina, etc.) occur in these beds, 

 hut no nummulites. Lepidocyclina elephantina, a good Aquitanian 

 species, is found with Oopecten rotundatus from Birlibah. 



The most characteristic of the Priabonian molluscais Pecten arcuatus, 

 a species occurring in Northern Italy, the Balearic Islands, Algeria, 

 Tunis, the Balkan Peninsula, Armenia, etc. A new species of 

 JEquipecten is described. Nummulites abound in these rocks. 



An indeterminable ostreiform shell has been collected in the neigh- 

 bourhood of Ain Sciahat, associated with the large Nnmmxdites 

 gizehensis — thus demonstrating that Lutetian rocks are present in 

 Cyrcnaica. So far as the mollusca are concerned, nothing older than 

 Lutetian has been observed in this collection. 



(3) Foraminifera, Ostracoda, and Parasitic Pungi from the Kainozoic 



Limestones of Cvrenaica. By Frederick Chapman, A.L.S., 

 F.R.M.S. 



This paper describes the Poraminifera, Ostracoda, and a parasitic 

 fungus found in the limestones of Cyrenaica. The Poraminifera are 

 mainly from the Middle Eocene ; others belong to the Upper Eocene, 

 and to the Aquitanian or Stampian. The most abundant Foraminifer 

 is Nummidites gizehensis, which is represented in the Dern a Limestones 

 by its typical form, and is there associated with the typical form and 

 a new variety of N. curvispira. At a higher horizon below Ain 

 Sciahat and in the Slonta Downs is a nummulitic limestone containing 

 JV. gizehensis, var. lyelli. 



Some limestones at Wadi TTmzigga contain Lepidocyclina elephantina, 

 and are referred to the Aquitanian or Stampian. 



Further details are given of the structure of Orthophragmina pratta. 

 A new species of Loxoconcha is described. The boring fungus 

 Palceachyla perforans occurs perforating Lepidocyclina. 



(4) The Fossil Echinoidea of Cyrenaica. By John Walter Gregory, 



D.Sc., F.U.S., F.G.S. 



The Echinoidea collected in the journey across Cyrenaica are referred 

 to ten species, of which two are new and one is a new variety. The 

 echinoids come from four horizons : the oldest fauna belongs to the 

 Middle Eocene ; the Upper Eocene or Priabonian fauna is represented 

 by an unusually early species of Amphiope, and by an Echinolampas 

 which is widely distributed through the country and is referred to the 

 Priabonian E. chericherensis, Gauth. Some echinoids from the Cyrene 

 Limestones are of Aquitanian affinities, and others seen in the lime- 

 stone east of Benghazi are Miocene. The affinities of Hypsoclypeus 

 hemisphericus (Greg.) are considered. The echinoid faunas show that 

 the Eocene rocks containing them were, as a whole, deposited in a sea 

 of moderate depth, The Miocene strata were formed in comparatively 

 shallow water. 



