the Nomenclature of the Foraminifera. 229 



Fig. 74, Glolifjerina foveolata (1844, p. 67), a large and 

 characteristic Gl. huUoides. Fig. 75, PlanuUna pertusa (1844, 

 p. 67), fig. 77, PL stigma (1844, p. 67), and fig. 78, RotaUa 

 fflobiilosa {1838 ; 1844, p. 67), are young Globigerhue. Fig. 

 76, Golpopleura ocellata {" 1844, pp. 67, 92 ; RotaUa ocellata, 

 1838 ") is a variety of PlanorhuJina farcta, very near to Hai- 

 dingerii^ with very large irregular holes. Fig. 79, RotaUa 

 scahra (1844, p. 67), a very coarse-shelled variety of Pl.farcta^ 

 of the ammonoides group. Fig. 80, Textilaria perforata 

 (1844, p. 68), obscure ; possibly an unusually perforate young 

 Textilaria with globose chambers, but probably an irregularly 

 grown Globigerina. Fig. 81, Strophoconus ovum (1844, p. 96), 

 is a young Virgidina Schreibersii, 



These represent a fauna that lived at not less than 100 

 fathoms. 



Species and noticeable Varieties from Galtanisetta^ figured by 

 Ehrenberg. 



1. Virgulina Schreibersii, Gzj'zek. 



2. Textilaria? 



3. Globigerina buUoides, Z)' Orb. 



4. Planorbulina Haidingerii [D'' Orb.). 



5. ammonoides? (Rss.). 



VI. The Nummulitic Limestone of Egyjjt has been regarded 

 as of Tertiary age by geologists since the determination of its 

 Eocene characteristics by the late lamented Sir Roderick 

 Murchison, in his memoir on the Alps and Carpathians, &c. 

 Quart. Journ. Geol. Soc. 1849, vol. v. p. 303. It had pre- 

 viously been looked on as of Cretaceous age ; and Ehrenberg, 

 in the ' Mikrogeologie,' speaks of it as belonging to that pe- 

 riod, on the ground of his finding Cretaceous Foraminifera in 

 it. His figures do not bear evidence of this in a special man- 

 ner ; indeed the Nummidime are preeminently " Tertiary," 

 none being known in the Chalk of Eui'ope, and only a few 

 specimens of OpercuUna'^ ^ their nearest ally. A doubtful • 

 Nummulina^ N. cretacea, Fraasf, has been recorded as be- 

 longing to the Hippurite (Cretaceous) Limestone of Palestine, 

 near Jerusalem ; and with this feeble link (strengthened 

 by other considerations) it may be said that there may be 

 some Nummulite-bearing rocks transitional from the Chalk 

 series to the Eocene. Those of Egypt, however, are markedly 

 Eocene. 



* Operculina Fleuriausi (Rss.) ; Op. cretacea, Rss. ; Oj). clypeulus 

 (Rss.) ; Op.? anf/nlaris, Comuel; Op. turgida (Elir.). 

 t ' Aus deni Orient,' 1807, pi. 1. tig. 8. 



