498 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



Locality and geologic occurrence.— Csmol Zone, station 6020c, in the 

 Culebra formation at Las Cascadas, collected by T. W. Vaughan and 

 D. F. MacDonald. 



Anguilla, station 6967, Crocus Bay, collected by T. W. Vaughan. 



Antigua, station 6854, Rifle Butts, Antigua formation, collected by 

 T. W. Vaughan. 



Type.—^o. 325072, U.S.N.M. (pi. 146, figs. 6, 6a, Qh). 



Paratypes.— No. 335074, U.S.N.M. (3 specimens). 



This species is one of those that is intermsdiate between Porites 

 and Goniopora. As there are short tertiary septa within the wall, 

 according to Bernard's treatment of such forms, it is referred to 

 Goniopora. 



The types are from Las Cascadas, Canal Zone. The calices of 

 the specimens from Anguilla are not so well preserved as those of the 

 cotypes, but the identifications seem reasonably certain, as there is 

 agreement in all general characters and m the observed detail. 



Genus PORITES Link. 



1807. Porites Link, Beschreibungen der Naturaliens Sammlungen, Rostock, p. 



162. 

 1918. Porites Vaughan, Carnegie lust. Washington Pub. 213, p. 138. 



Type-species. — Madrepora porites Pallas. 



PORITES PORITES (Pallas). 



1766. Madrepora porites Pallas (part), Elench. Zooph., p. 324. 



1901. Porites porites forma clavaria Vaughan, U. S. Fish Com. Bull, for 1900, 



vol. 2, p. 310, pi. 29; pi. 31, fig. 2. 



1902. Porites porites Vaughan, Biol. Soc. Washington Proc, vol. 15, pp. 56-58 



(with references to literature and history of the name). 

 1909. Porites porites var., Vaughan, Carnegie Inst. Washington Yearbook No. 7, 



p. 135. 

 1912. Porites clavaria Vaughan, Carnegie Inst. Washington Yearbook No. 10, pp. 



148, 152, 156, pi. 4, fig. 4c; pi. 6, figs. 3, 4. 



1915. Porites clavaria Vaughan, Washington Acad. Sci. Journ., vol. 5, p. 597. 



1916. Porites clavaria Vaughan, Nat. Acad. Sci. Proc, vol. 2, pp. 95, 98. 



1916. Porites clavaria Vaughan, Carnegie Inst. Washington Yearbook No. 14, p. 

 228. 



This is one of the species of corals to which most attention was 

 given during my studies of the Floridian and Bahamian reef corals, 

 and it is referred to m most of my reports in Yearbooks No. 7-14, 

 inclusive, of the Carnegie Listitution of Washington, usually as 

 Porites clavaria, because that is the more generally kcown name. 



Localities and geologic occurrence. — Recent throughout the coral- 

 reef areas of the West Lidies, the eastern side of Central America, 

 Florida, and the Bermudas. 



Pleistocene, in the elevated West Indian reefs. 



