550 R. Sullen Neioton — Sheik from Raised Beaches, Red Sea. 



Distribution. — Pleistocene deposits from near Kosseir (Fraas) 

 and the Bitter Lakes (Fuchs). Coll. Geol. Surv. Egypt: raised 

 beach north of Kosseir (Nos. 2,121-2,138, Box No. 50/) ; raised 

 beach, Northern Wadi Gueh, Camp 6, 240 feet above sea (No. 1,636, 

 Box No. 22&) ; upper coral terrace (Pecieji-bed) between Nebk and 

 Sherm, South-East Sinai (No. 3,540, Box No. 40 Z). 



Chlamys Eeissi, Bronn. (PI. XXII, Fig. 10.) 



Eiiinites Reissi, Bronn: Eeiss' "Santa Maria," in Neues Jahrb., 1862, p. 44, pi. i, 



fig. 18. 

 Pecten Reissi, Mayer-Eymar: in Hartung's "Geol. Besch. Madeira," etc., 1864, 



p. 227, pi. T, fig. 32. 



Testa subcequivalvi rotimdato-oblonga, compressa, costis radiantibus 

 circiter 30, incBqualibus, irregularibusqiie, rotundatis ; squamulosis, 

 smpe binis ; auriculis incsqualibus radiatis, antica maj'ori, obliqua. 

 (Mayer-Eymar.) 



The numerous elevated, rounded costse, covered with close squamu- 

 lose ornamentation, appear to be the distinguishing features of this 

 shell. The structural characters are well displayed in the specimen 

 figured, although the marginal line has been fractured in places, and 

 a central breakage rather spoils its otherwise elegant appearance. 



DiBiENSiONS. — Height 46, width 42 mm. 



Distribution. — Modern limestone of the Azores and Madeira 

 (Bronn, Mayer-Eymar, etc.) and near Kosseir (Fraas). Coll. Geol. 

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

 Box No. 50/) ; raised beach east of Jebel Esh (Nos. 2,172-2,190,. 

 Box No. 64 



Chlamys varia, Linneeus. 



Ostrea varia, Linnieus : Systema Natiu'aB, 10th ed. (1758), p. 698. 

 Distribution. — Eecent in the Mediterranean, etc. ; Tertiary of 



Italy and other parts of Europe. Coll. Geol. Surv. Egypt : raised 

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



Chlamys (Gigantopecten) latissima, Brocchi. 



Ostrea latissima, Brocchi: Conch. Foss. Siibapennina, vol. ii (1814), p. 581. 



The specimens are small and apparently very young forms. 



Distribution. — Species extinct, and ranging from Miocene 

 (Helvetian) to Pleistocene times (Mayer-Eymar, etc.). Coll. Geol. 

 Surv. Egypt : raised beach east of Jebel Esh (Nos. 2,172-2,190, 

 Box No. 64/) ; Pecten-heA, upper coral terrace between Nebk and 

 Sherm, south-east of Sinai (No. 3,540, Box No. 4,01). 



Chlamys (^quipecten) opercularis, Linnaeus. 



Ostrea opercularis, Linnseus : Systema Naturae, 10th ed. (1758), p. 698. 



A fragmentary specimen, exhibiting the usual structure of this 

 species, associated with Fecten Vasseli of Fuchs. 



Distribution. — Eecent in the Mediterranean and other European, 

 seas, and ranging from Miocene (Helvetian) to Pleistocene times 

 (Mayer-Eymar, etc.). Coll. Geol. Surv. Egypt: raised beach. 

 Northern Wadi Gueh, Camp 6, 240 feet above sea (No. 1,636^ 

 BoxNo. 22ifc). ^ ' ' 



