^GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 333 

 SYSTEMATIC ACCOUNT OF THE FAUNAS. 



Class ANTHOZOA. 



MADREPORARIA IMPERFORATA. 

 Family SERIATOPORIDAE Milne Edwards and Haime. 



1849. Seriatoporidae Milne Edwards and Haime, Comptes Rend., vol. 29, p. 262. 



1869. Pocilloporidae Verrill, Essex Inst. Proc, vol. 6, p. 90. 



1870. Stylophoridae Verrill, Conn. Acad. Arts and Sci. Trans., vol. 1, p. 514. 



In a recent publication x I have stated that while I seriously 

 doubted the propriety of placing Stylophora and Pocillopora in 

 separate families, the traditional usage was followed. Additional 

 study since that statement was written has convinced me that Stylo- 

 phora, Seriatopora, and Pocillopora all belong to the same family. 

 In fact, it seems that both Seriatopora and Pocillopora are derived from 

 Stylophora, mostly through retrogression in the development of the 

 septa. It is hoped to present in a future paper the evidence on which 

 this suggestion is based. 



Genus STYLOPHORA Schweigger (emend. Milne Edwards and Haime). 



1819. Stylophora Schweigger (part), Beobacht. auf Naturf., pi. 5. 



1820. Stylophora Schweigger, Hand. Naturg., p. 413. 



1830. Stylophora and Sideropora de Blainville, Diet. Sci. nat., vol. 60, pp.319, 



351.. 

 1835. Anthopora Gray, Zool. Soc. London Proc. for 1835, pt. 3, p. 86. 

 1846. Sideropora Dana, U. S. Expl. Exped. Zooph., p. 517. 

 1850. Stylophora Milne Edwards and Haime, Ann. Sci. nat., ser. 3, Zool., 



vol. 13, p. 102. 

 1857. Stylophora Milne Edwards and Haime, Hist. nat. Corall., vol. 2, p. 133. 

 1861. Stylophora de Fromentel, Intr. Polyp, foss., p. 179. 

 1884. Stylophora Duncan, Linn. Soc. London Journ., Zool., vol. 18, p. 45. 



Type-species. — Madrepora pistillata Esper. 



Duncan in his papers on the Fossil Corals of the West Indies either 

 describes as new or lists the following species: 

 From the Eocene of Jamaica: 



Stylophora contorta (Leymerie) + 1 var. 

 From the Eocene of St. Bartholomew, Cleve collection: 

 Stylophora compressa 2 Duncan. 

 distans (Leymerie). 



1 Carnegie Inst. Washington Pub. 213, p. 73, 1918. 



2 Although I have studied the collection rom St. Bartholomew submitted to Duncan, I could recognize 

 -only one species which I have divided into our varieties. 



