352 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



Antigua: Station 6881, Willoughby Bay, collected by T. W. 

 Vaughan in the Antigua formation. 



Family OCULINIDAE Milne Edwards and Haime. 



Genus OCULINA Lamarck.^ 



1816. Oculina Lamarck, Hist. nat. Arum, sans Vert., vol. 2, p. 283. 



1849. Oculina Milne Edwards and Haime, Comptes Rend., vol. 29, p. 68. 



1850. Oculina Milne Edwards and Haime, Mon. Brit. foss. Cor., Intr., p. XIX. 



Type-species. — Madrepora virginea Ellis and Solander. 



OCUUNA DIFFUSA Lamarck. 



1816. Oculina diffusa Lamarck, Hist. nat. Anim. sans Vert., vol. 2, p. 285. 



1901. Oculina diffusa ? variety Vaughan, U. S. Fish Commission Bull, for 1900, 



vol. 2. p. 294, pi. 1, figs. 5. 5a. 

 1915. Oculina diffusa Vaughan, Washington Acad. Sci. Journ.. vol. 5, p. 596. 

 1915. Oculina diffusa Vaughan, Carnegie Inst. Wash. Yearbook No. 14, p. 227. 



Doctor MacDonald obtained seven pieces of branches of this 

 species at the locality mentioned below. They are slender and 

 resemble fragments from specimens of Oculina diffusa, which grow 

 either in water 10 to 16 fathoms deep or where the water is very 

 quiet. The specimens from Panama nearly duphcate those I de- 

 scribed from Porto Rico. 



Locality and geologic occurrence. — Canal Zone, station 5849, swamp, 

 Mount Hope, Pleistocene, collected by D. F. MacDonald. 



OCUUNA VARICOSA LeSueur. 



1820. Oculina varicosa Le Sueur, Paris Mils. Mem., vol. 6, p. 291, pi. 17, fig. 19. 



1902. Oculina varicosa Verrill, Conn. Acad. Sci. Trans., vol. 11, pi. 32, figs. 2, 3, 



4 (refs. to literature). 



A single nearly typical fragment of a branch was obtained. 

 Locality and geologic occurrence. — Canal Zone, station 5849, swamp, 

 Mount Hope, Pleistocene, collected by D. F. MacDonald. 



ARCHOHELIA, new genus. 



ArcTiohelia differs from Oculina solely by having a persistent axial 

 corallite, whereas in Oculina there is no axial corallite. Pali or pali- 

 f orm teeth are present on all but the last cycle of septa. Columella 

 trabecular, with some papillae on its upper surface. 



Type-species. — ArcJioTielia limonesis Vaughan. 



The relations of this genus to the species described in my mono- 

 graph on the Eocene and lower OUgocene coral faunas of the United 

 States ^ under the names Astrolielia neglecta, A. hurnsi, Oculina vicTcs- 

 hurgensis, 0. mississippiensis, 0. singleyi, 0. alahamensis, 0. Jiarrisi, 



1 Toula (K. K. Geolog. Reichsanstalt Jahrb., vol. 61, p. 489, pi. 30, fig. 1, 1911) applies the name 0cm- 

 lina gatunensis to a piece of a branch of coral, but his description and figure are inadequate for the iden- 

 tification of the species. 



2 U. S. Geol. Survey Monograph 39, pp. 114-124, 1900. 



