GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 395 



Figures of Orbicella irradians and some notes on it are introduced, 

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

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

 paliform lobes seem more specialized in 0. irradians. 



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

 record it from Castel Gomberto and Chaine d'Hala (Sinde). Reuss 2 

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

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

 and Montecchio Maggiore. 3 D'Archiardi mentions it as occurring in 

 what he designates as the Castel Gomberto, Montecchio Maggiore, 

 and Monte Viale groups. 4 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 

 Orbicella 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 Stylophora, Galaxea, Endopachys, Goniopora, and Alveo- 

 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 Phyllocoenia, genotype P. irradians, is a syno- 

 nym of Orbicella Dana. 



Genus SOLENASTREA Milne Edwards and Haime. 



1848. Solehastrea Milne Edwards and Haime, Compt. Rend., vol. 27, p. 494. 

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

 tion, p. xl. 

 3917. Solenastrea Vaughan, U. S. Geol. Survey Prof. Pap. 98-T, p. 371. 



Type-species. — Astrea turonensis Michelin. 



SOLENASTREA HVADES (Dana). 



1846. A[straea] Orbicella hyades Dana, U. S. Expl. Exped. Zoophytes, p 212, 



pi. 10, fig. 15. 

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



pi. 10, fig. 16. 

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



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



i Icon. Zoophytol., p. 58, pi. 12, fie. 4, 1SJ2. 



2 K. K. Akad. Wissensch. Wien, Math.-Natuwiss. CI. Denksehr., vol. 28, p. 156, 1868. 



3 Idem, p. 135. 



< Studio comparativo fra i coralli dei terreni terziari del Piemonte e dell' Alpi Venete,p. -16, Pisa, 1868;_ 



