SOME MADREPORAKIAN CORALS P^ROM FRENCH SOMA- 

 LILAND, EAST AFRICA, COLLECTED BY DR. CHARLES 

 GRAVIER. 



B}^ T. Wayland Vai T(.HA^, 



Custodian, Madreporaria, l\ S. Xatioiud. Museum, and (reuhxjist, U. <S'. Geolugical iSurvey. 



Doctor Charles Gravier, of the Museum (THistoire Naturelle, Paris, 

 kindly submitted to me for study and report that portion of the collec 

 tion of corals made by him in 190-i, in French Somaliland, that would 

 safely bear transportation to this country. I accordingly received the 

 so-called Astreans, the Fung-ids, the Astreopores, and the Goniopores. 

 The t^'pe specimens, in the case of new forms, are the property of the 

 Paris Museum; but paratypes or fragments of the types are in the 

 United States National Museum. 



As the collection was obtained at a locality just outside the mouth 

 of the Red Sea, it is of special interest for comparison with the faunas 

 of the Red Sea, the East Coast of Africa, and the regions farther to 

 the east in the Indian Ocean. 



I desire to express my thanks to Mr, J. Stanley Gardiner, of Gon- 

 ville and Caius College, Cambridge, for kindly comparing photographs 

 and my descriptions of Orhlcella anmdigera and the Cyphastreic with 

 his specimens from the Maldive and Laccadive archipelagoes. 



Genus PHYSOGYRA Quelch. 



1886. Phi/sogj/ra Quklch, Keef Corals, "Challenger" Keporti^, p. 75. 

 Quelch established this genus for a coral that he described as Physo- 

 gt/raaperfa, from Banda, and the P/e)'o(/i//'(f / ic/itenstelniMi\ne Edwards 

 and Haime, of unknown habitat. The latter species has not, to ni}" 

 knowledge, been figured. Doctor Gravier obtained two species, which 

 are subsequently^ described, from French Somaliland. In order to 

 show the ditferential characters of the four recognized species I have 

 prepared the following synopsis: 



SYNOPSIS OF THE SPECIES OF PHYSOGYRA. 



Without wall ridge on the colline summits: 



Upper margins of the septa arched or flattened I', stjinaliensls, new species. 



Proceedings U. S. National Museum, Vol. XXXII— No. 1526. 



249 



