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 pajjer entitled: Some shoal-water corals 

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

 Island.^ My remarks particularly applied to the ])aratype from sta- 

 tion 6894. 



Oyathomorpha roxboroughi closely resembles those specimens of 

 C. anguillensis with smaller calices. 



0. 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. 



CYATHOMORPHA ANTIGUENSIS (Duncan) Vaughan. 



riate 129, iig. 2; plate 130, ligs. 1, la, 2, 2o, 3; plate .131, llgs. 1, la, lb, 2, 3,4; plate 

 132, figs. ], 2, 2a, 26; plate 133, fig. 1. 

 1863. Astraea aniignensu Duncan, Geol. Soc. London Quart. .Journ., vol. 19,. 



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

 1863. fAstroria affinis Duncan, Geol. Soc. London Quart. Journ., vol. 19, p. 425. ' 

 1863. Asiroria antigtiensis Dtincan, Geol. Soc. London Quart. Journ., vol. 19^ 



p. 425. 

 1866. fAstroria affinis Duchassaing and Michelotfi, Sup. Corall. .\ntilles, p. 83 



(of reprint). 

 1866. Astroria aniiguensis Ducha.ssaing and Michelotti, Sup. Corall. Antilles,. 



p. 83 (of reprint). 



1866. Heliastraea antiguensis Duchassai.n'g and Michelotti, Sup. Corall. Antilles^ 



p. 86 (of reprint). 



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

 1867. Astroria antiguensis Duncan, Geol. Soc. London Quart. Journ., vol. 24,. 



p 24. 

 1867. Heliastraea aniiguensis 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. Astroria antiguensis Duchassaing, Rev. Zooph. Antilles, p. 30. 



This species was referred by me doubtfully to the synonymy of 

 Orhicella 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 very small base. Corallites long, close, rather 

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

 well developed, moderately thick. Costae moderately developed, 

 projecting more than the width of then- 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 in 

 those that are fully developed. Calices cu-cular, slightly raised, 



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



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



