Dr. J. W. Gregory — Egij2Man Corals. 249 



necessitate the reference of this species to the genus CoeJosmilia. 

 The only other genus that needs consideration is Smiloti-ochus, 

 which has simpler and more crowded septa and narrower inter- 

 septal loculi. 



The nearest allied species is Coelosmilia Faujasi (Ed. & H.),'^ from 

 the Maastrichtian of Ciply, which has a peduncle, although, as the 

 authors of the species remark, the coral probably becomes free when 

 mature. But the Belgian coral is much taller, and narrower ; the 

 height is 40 mm. and its diameter 20 mm., whereas the Egyptian 

 species is smaller, lower, and proportionately broader. 



Coelosmilia elUptica, Reuss,^ from the Oiigocene of Castelgomberto, 

 is also an allied form, but has longer, more equal septa, and a small 

 axial space. It is also pedunculate. Another similar species was 

 described as Smilotrochus cristatiis, Felix,^ from San Giovanni 

 Harione, but in that species also the septa are less unequal, those of 

 the last orders being much longer than in Coelosmilia Milneri. 



The species is named after the distinguished former Financial 

 Adviser to the Khedive, by whose management of the Egyptian 

 finances the Geological Survey of the country has been rendered 

 possible. 



Genus STYLOPHORA, Schweigger, 1819. 



Stylophora similis (Mayer-Eymar), 1883. 



Astrolielia similis, Mayer-Eymar, 1883, " Verst. tert. Birket - el - 

 Qurnn " : Beitr. libysch. Wiiste, vol. i, pt. 2, p. 73, 

 pi. xxiii, fig. 2. 



Distribution. — Upper Eocene : Fayum, in Lake Birket-el-Qurun 

 (Mayer-Eymar), and Coll. Geol. Surv. Egypt, No. 619. 



Description of Figure, — PI. VIII, Fig. 6, two corallites showing 

 the columella, x 3 diam. 



Affinities. — The occurrence of a well-developed columella in 

 this coral is alone sufficient to necessitate its removal from Astrolielia. 

 The species is a member of Duncan's alliance the Stylophoroida, and of 

 the genus Stylophora, of which its nearest ally is perhaps S. distans 

 (Leym.).^ Comparison of the figure here given of two corallites 

 witli Leymerie's figures of S. distans shows the resemblance between 

 them ; the corallum in the latter is granulate, but so it may also 

 have been in the Egyptian species. The specimens are not well 

 preserved, having been polished and worn by sand ei'osion. Professor 

 Mayer-Eymar's figures do not show the columella, which is not often 

 seen in the five specimens in the Geological Survey Collection. Two 



^ Parasmilia Faujasi, Edwards & Haime, "Mon. Astr." : Ann. Sci. nat., ZooL, 

 ser. 3, vol. x (1849), p. 245. Edwards & Haime, " Hist. nat. Cor.," vol. ii, p. 177. 



2 A. E. von Reuss, "Pal. Stud. alt. Tert. Alpen": Dank. Akad. Wiss. Wieu, 

 vol. xxviii (1868), p. 140, pi. i, fig. 5. 



^ J. Felix, " Krit. Stud. tert. Kor. Vicentin " : Zeit. deut. geol. Gesell., 

 vol. xxxvii (1884), p. 382, pi. xvii, figs. 1-3. 



* A. Le)auerie, "Mem. Terr, a Nummul. Corbieres" : Mem. Soc. geol. France, 

 ser. 2, vol. i (1844), p. 358, pi. xiii, fig. 6. 



