548 R. Bullen Neivton — Shells from Raised Beaches, Red Sea. 



1 



Lithophaga Avitensis, Mayer-Eymar, 



LithodomKs Avitensis, Mayer-Eymar, in Homes' " Foss. Moll. Tert.-Beck. "Wien.": 

 Abhandl. k.k. geol. Reichs., 1867, p. 354, pi. xlv, fig. 12. 



This species is represented by some excellent casts showing 

 ornamentation and form. 



Distribution. — Miocene of Germany (Mayer-Eymar) ; Pliocene 

 of Italy (Pantanelli, etc.). Coll. Geol. Surv. Egypt : Ras Shokhair, 

 west coast of the Gulf of Suez, north-east of Camp 50 (No. 2,265, 

 Box No. Z5h) ; raised beach. 380 feet above sea, near Camp 7, Wadi 

 Shigeleb (No. 1,662, Box No. 64&). 



Lithophaga Lessepsianus ? Vaillant. 



Savigny's Desc. de I'Egypte, 1817, pi. xi, fig. 3. 



Lithophag us Lessepsianus, Vaillant: Journ. Conchyliologie, 1865, p. 115. 



Eepresented by a cluster of young forms in coral crypts, resting 

 on matrix, probably belonging to this species. 



Distribution. — Gulf of Suez (Vaillant). Coll. Geol. Surv. 

 Egypt : raised beach north of Kosseir (No. 2,111, Box No. 46/). 



Lithophaga Lyellanus, Mayer-Eymar. 



Lithodomus Lyellamis, Mayer-Eymar: ia Hartung's "Geol. Beschr. Madeira," 

 1864, p. 218, pi. iv, fig. 23. 



A species of less cylindrical shape than L. Avitensis, otherwise 

 closely related ; represented by casts only. 



Distribution. — Tertiary : Madeira (Mayer-Eymar). Coll. GeoL 

 Surv. Egypt : raised beach north of Kosseir (Nos. 2,121-2,138, Box:. 

 No. 50y). 



Family OSTREID^. 



Alectryonia cucuUata ? Born. 



Ostrea cueuUata, Born: Testacea Mus. Ca3sarei Vindobonensis, 1780, p. 114, pi. vi, 

 figs. 11, 12. 



Represented by some young examples of a plicated oyster, which 

 may probably belong to this species. 



Distribution. — Eed Sea, etc. ; and in the later Tertiary formations 

 of Italy, Algeria, Egypt, etc. Coll. Geol. Surv. Egypt : raised 

 beach 20 feet above sea, Gharib lighthouse (Nos. 2,058-2,098, Box 

 No. 18/; Nos. 2,090-2,105, Box No.. 20/). 



Alectryonia crenulifera, G. B. Sowerby. 



Ostrea crenulifera, G. B. Sowerby: Conchologia Iconica, vol. xviii (1871), pi. xxvii, 

 fig. 67. 



An example consisting of a single valve externally covered with 

 several small Balani. 



Distribution.— Eed Sea (B.M. and G. B. Sowerby). Coll. Geol. 

 Surv. Egypt : raised beach north of Kosseir (Nos. 2,121-2,138, Box 

 No. 50/). 



Alectryonia plicatula, Gmelin. 



Ostrea plicatula, Gmelin: Systema Natiiras, 13tli ed. (1790), p. 3,336. 

 Distribution. — Mediterranean, Atlantic and Indian Ocean ; 

 Miocene to Saharian of Italy, Egypt, etc. (Mayer-Eymar). Coll. 

 Geol. Surv. Egypt : raised beach north of Kosseir ; an adult 



