﻿GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 395 



Figures of Orhicella irradians and some notes on it are introduced 

 here, because of the close resemblance of Orhicella tampdensis to it. 

 The beading of the costae in 0. tampdensis appears coarser, and 

 p aliform lobes seem more specialized in 0. irradians. 



Locality and geologic occurrence. — Milne Edwards and Haime (1857) 

 record it from Castel Gomberto and Chained'Hala (Sinde). Reuss^ 

 says it is the most abundant anthozoan of the Monte Grumi beds. 

 He also records it from Castellaro, Monte Spiado, Monte del Camoli, 

 and Montecchio Maggiore.^ D'Archiardi mentions it as occurring in 

 what he designates as the Castel Gomberto, Montecchio Maggiore, 

 and Monte Viale groups.* Fabiani refers Heliastraea irradians, by 

 which I believe he means this species, to the Lutetian (Eocene) and 

 to the Rupelian (middle Oligocene) of Castel Gomberto and San 

 Giovanni Ilarione. The specimen in the United States National 

 Museum (No. 164723) (see pi. 97, figs. 3, 3a), was received from 

 Professor Parona of the University of Turin, and came from 

 Monte Grumi di Castel Gomberto. Although apparently reported 

 from the Lutetian Eocene of Veneto, it is most abundant in the 

 Rupelian or middle Oligocene. Because of the close resemblance of 

 Orhicella tampdensis to 0. irradians, of the presence of Antiguastrea 

 cellulosa in the "silex" bed at Tampa, and of the presence at Tampa 

 of species of StylopJwra, Galaxea, Endopachys, Goniopora, and Alvec- 

 pora, all genera now extinct in the Atlantic Ocean, I believe that 

 the fauna of the *'silex" bed at Tampa surely is as old as upper 

 Oligocene. 



The generic name PhijUocoenia, genotype P. irradians, is a syno- 

 nym of Orhicella Dana. 



Genus SOI.ENASTREA Milne Edwards and Haime. 



]848. Solenastrea Milne Edwards and Haime, Compt. Rend., vol. 27, p. 494. 

 1850. Solenastrea Milne Edwards and Haime, British fossil corals, Introduc- 

 tion, p. xl. 

 1917. Solenastrea Vaughan, U. S. Geol. Survey Prof. Pap. 98-T, p. 371. 



Type-species. — Astrea turonensis Michelin. 



SOLENASTREA HYADES (Dana). 



184fi. A[straea] Orhicella hyades Dana, U. S. Expl. Exped. Zoophytes, p 212, 



pi. 10, fig. 15. 

 1846. A\straea\ Orhicella excelsa Dana, U. S. Expl. Exped. Zoophytes, p. 212, 



pi. 10, fig. 16. 

 1902. Orhicella excelsa Verrill. Conn. Acad. Arts and Sci. Trans., vol. 11, p'. 98, 



pi. 15, figs. 4, 4a, 46. 



> Icon. Zoophytol., p. 58, pi. 12, fig. 4, 1.S12. 



2K. K. Akad. Wissensch. Wien, Math.-Natuwiss. 01. Denkschr., vol. 28, p. 156, 1868. 



3 Idem, p. 13.5. 



* Studio comparativo fra i coralli del terreni terziari del Piemonte e dell' Alpi Venete, p. 16, Pisa, 1868. 



