246 Dr. J. W. Gregory — Egyptian Corah. 



S. conferta, Eeuss,^ S. tuberosa (Cat.),^ S. annul ata, Eenss,^ and 

 S. pulcherrima, Ach./ this new species may be easily distinguished, 

 as they have plain inter-calicular areas, and the calices surrounded 

 by a small raised rim. S. confiisa, Dune.,* from the Gaj Series 

 (Miocene) of Sind, differs by its very crowded corallites. 



Genus OEBICELLA, Dana, 1848. 



Orbicella Schweinfurthi (Felix), 1884. 



HeliastrcBa Schioeinfurthi, Felix, 1884, " Kor. agypt. Tert. ": Zeit. 

 deut. geol. Ges., vol. xxxvi, p. 449, pi. v, fig. 5. 



Distribution. — Middle Miocene — Helvetian: Wadi Eamlieh 

 (Felix) ; near north side of Jebel Attaka, near Suez ; Coll. Geol. 

 Surv. Egypt, Nos. 997 and 999. 



Figure. — PI. IX, Fig. 3, part of a horizontal section, x 3 diam. 



Affinities. — One of the four specimens of this coral resembles 

 Orbicella Guettardi (Defr.),^ and may represent the fossil recorded 

 from Egypt by Fuchs '' as Heliastrcea cf. Rocheitana. It is certainly 

 very similar to the figures of that species given by D'Achiardi.® 

 Felix's species is an ally of 0. Defrancei (Ed. & H.),^ but the 

 calices are deeper. 



Genus PLESIASTE^A, Edwards & Haime, 1848. 



Plesiastrjea microcalyx (Felix), 1884. 



Heliastrcea microcalyx, Felix, 1884 : op. eit., p. 450, pi. v, fig. 4. 



Distribution. — Middle Miocene — Helvetian: Wadi Eamlieh 

 (Felix^. Between lat. 30° 16' 40" and 30° 15' 50", and long. 

 31° 54' 40" and 32° 2' 10"; Coll. Geol. Surv. Egypt, No. 814. 



Description of Figures. — PI. VIII, Fig. 5a, part of upper 

 surface of an encrusting corallum, x 2 diam. ; Fig. 56, horizontal 

 section across the same specimen, x 4 diam. 



Affinities. — This coral agrees exactly in external form with 

 Felix's figure, so that I feel no doubt as to their specific identity. 

 The coral has not the external aspect of an Orbicella, and I was 



1 Von Eeuss, ibid., p. 25, pi. ix, fies. 3-6. 



2 T. A. Catullo, "Terr. Sedim. Sup. Venezie " (1856), p. 63, pi. xiv, fig. 3; 

 and Von Reuss, op. cit., p. 46, pi. ix, fig. 7. 



^ Von Eeuss, " Foram. Anth. Bry. Oberburg " : Dank. Akad. Wiss. Wien, 

 vol. xxiii (1864), p. 12, pi. ii, figs. 1-3. 



* A. d'Achiardi, "Cor. Eoc. Fruili," pt. iii : Atti Soc. tosc. Sci. nat., vol. i 

 (1875), p. 176, pi. xiii, figs. 1-11. P. M. Duncan, " Foss. Cor. Sind": Pal. 

 Indica, ser. xiv, pt. 1 (1880), p. 73, pi. xv, figs. 12, 13. 



5 Duncan, ibid., p. 83, pi. xxiii, fig. 7. 



6 Vide Michelin, "Icon. Zoopb." (1842), p. 58, pi. xii, fig. 3. 



' Th. Fucbs, " Beitr. Kenntn. Mioc. fauna Aegypt." : Beitr. Geol. libysch. 

 "Wiiste, vol. iii (1883), p. 65. 



^ A. d'Acliiardi, " Studio Comp. Cor. Terr. terz. Piem. e Alpi Venete " : Annali 

 Univ. Pisa, vol. x (1868), p. 14, pi. i, figs. 12, 13. 



^ Vide Von Eeuss, " Foss. Kor. oster.-ung. Mioc." : Denk. Akad. "Wiss. Wien, 

 vol. xxsi (1871), p. 239, pi. ix, fig. 3 ; pi. x, fig. 1. 



