GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 463 



This is the species to which I referred as Diploastrea froni 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. 1 My remarks particularly applied to the par a type from sta- 

 tion 6894. 



Cyaihomorpha roxboroughi closely resembles those specimens of 

 0. anguillensis with smaller calices. 



G. 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. 



Plate 129, fig. 2: plate 130, figs. 1, la, 2, 2a, 3; plate 131, figs. 1, la, lb, 2, 3,4,; plate 

 132, figs. 1, 2, 2a, 26: plate 133, fig. 1. 

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



p. 425. 

 1866. fAstroria affinis Duchassaing and Michelotti, Sup. Corall. Antilles, p. S3 



(of reprint). 

 1866. Astroria antiguensis Duchassaing and Michelotti, Sop. 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- 

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



p 24. 

 1867. Heliastraea antiguensis 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. 

 18'70. Astroria antigueiisis Duchassaing, ReA\ Zooph. Antilles, p. 30. 



This species was referred by me doubtfully to the synonymy of 

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

 Reefs of Curacao, Arube and Bonaire, 2 not having recognized at 

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



Original description. — "Corallum large, turbinate, convex and 

 gibbous above, with a very small base. Corallites 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 in 

 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. 



