﻿GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 463 



This is the species to which I referred as Diploastrea from the lowest 

 horizon of the exposure at Crocus Bay, Anguilla, in discussing the 

 genus Diploastrea in my paper entitled: Some shoal-water corals 

 from Murray Island (Australia), Cocos-Keeling Islands, and Fanning^ 

 Island.^ My remarks particularly applied to the paratype from sta- 

 tion 6894. 



Oyathomorpha roxboroughi closely resembles those specimens of 

 C. anguillensis with smaller calices, 



C. roxboroughi is named for His Honor T. L. Roxborough, who was 

 administrator of St. Christopher while I was there and to whom I 

 am indebted for many acts of courtesy and kindness. 



OYATHOMORPHA ANTIGUENSIS (Duncan) Vaughan. 



Plate 129, fig. 2; plate 130, figs. 1, la, 2, 2fl, 3: plate 13J, figs. 1, la, U, 2, 3, -i: plate 

 132, figs. 1, 2, 2a, 2b; plate 133, fig. 1. ' 

 1863. Astraea antiguensis Duxcan, Geol. Soc. London Quart. .Journ., vol. J9, 



p. 419, pi. 13, fig. 8. 

 1863. fAstroria affinis Duncan, Geol. Soc. Loudon Quait. Journ., vol. 19, p. 425. 

 1863. Astroriu antiguensis Duncan, Geol. Soc. London Quart. .Journ., vol. 19,. 



p. 425. 

 1866. fAstroria affinis Du* hassaing and Michelotti. Suj). Corall. .\niillos, p. 8S 



(of reprint). 

 1866. Astroria antiguensis Duchassaing and Michei.otti, Su]). Corall. .Antilles, 



p. 83 (of reprint). 



1866. Heliastraea antiguensis Duchassaing and Michelotti, Sup. Corall. Antilles, 



p. 86 (of reprint). 



1867. fAstroria affinis Duncan, Geol. Soc. London Quart. Journ., vol. 24, p. 24. 

 1S67. Astroria antiguensis Duncan, Geol. Soc. London Quart. .Tourn., vol. 24, 



p 24. 

 1867. Heliastraea aniigvevsis Duncan. Geol. Soc. London Quart. Journ., vol. 24, 



p. 24. 

 1870. fAstroria affinis Duchassaing, Rev. Zooph. Antilles, p. 30. 

 1870. Heliastraea antiguensis Duchassaing, Rev. Zooph. Antilles, p. 30. 

 1870. Astro]-ia antiguensis Duchassaing, Re^■. Zooph. Antilles, p. 30. 



This species was referred by me doubtfully to the synonymy of 

 Orbicella cavernosa (Lmnaeus) in my Fossil Corals from the Elevated 

 Reefs of Curacao, Arube and Bonaire,^ not having recognized at 

 that tune that the species is one of the Madreporaria Fungida. 



Original description. — ''CoraUum large, tm'binate, convex and 

 gibbous above, with a ver}^ small base. CoraUites long, close, rather 

 crowded, but distinct and radiating from the narrow base. Walls 

 well developed, moderately thick. Costae moderately developed, 

 projecting more than the width of their base; they are plain where 

 seen superficially, very nearly equal, and are not spined or toothed. 

 In some coiallites the fourth cycle of costae is wanting, but not m 

 those that are fully developed. Calices circular, slightly raised, 



1 Carnegie Inst. Washington Pub. 213, p. 142, 1918. 



2 Geologisch. Reichs. Museum Leiden Samml., ser. 2, vol. 2, p. 28, 1901. 



