202 



BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



Keeling Islands.^ It is known that at least a few more than 51 

 species occur in these islands. Outside the main coral-reef zone 

 the number of species is smaller. For instance, there are only 43 

 supposedly valid species recorded from water between and 25 

 fathoms deep in the Hawaiian Islands and Laysan.^ It is not cer- 

 tain that 3 of the species included in the number 43 were obtained 

 in the Hawaiian Islands. The usual number of species obtained in 

 Florida or the West Indies, in water less than 25 fathoms deep, 

 where conditions are favorable for coral growth is about 35. There 

 were on the Antiguan reef as many species of corals as are at present 

 usual for one island or a small group of islands in the Indo-Pacific, 

 and about twice as many species as are usual on a living West Indian 

 reef. 



The reason for referring the Antigua reefs to a horizon above the 

 lower (Lattorfian) Oligocene is given on page 199. The following 

 list of middle (Rupelian) Oligocene genera is taken from Fabiani,^ 

 but it is considerably revised and needs further revision: 



Middle Oligocene {Rupelian) genera of corals in Veneto. 



*Stylophora. 



*8tylocoenia. ^ 



*Astrocoenia. 



Trochosmilia. 



Coelosmilia. 



Epismilia? 



Phyllosmilia? 



Parasmilia. 



*Euphyllia. 



Dichocoenia. 



Stylinal 



Grumia. 



Montlivaultia? 



Leptaxis. 



Astrangia. 



Holangia. 



Gombertangin. 



*Orhicella. 



Solenastrea. 



*Antiguastrea. 



Aplophyllia? 



lihabdophyllia. 



Calamophyllia 



*Goniastrea. 



*Hydnophora. 



*Leptomussa. 



Mycetophyllia. 



^Trochoseris. 



Cyathoseris. 



* Mesomorpha. 



Comoseris? 



Mycetoseris. 



Leptophyllia? 



Stephanosrailia . 



Thamnasteria? 



Dimorphastrea? 



Cyathomorpha. 



Hydnophyllia. 



Astraeomorphal 



Acropora. 



Dendracis. 



*Astreopora. 



*Actinacis. 



*Goniopora. 



*Porites. 



*Alveopora. 



* Indicates that the genus is also found in the middle Oligocene of the West Indies or the southeastern 

 United States. 



The generic characters of a number of the corals listed by 

 Fabiani can not be ascertained without a restudy of authentically 

 identified specimens in the light of modern systematic technique, 

 which require that besides having an adequate knowledge of the 

 morphology of the coral skeleton, the investigation shall proceed 

 from a critical study of the type-species of the genera to be recog- 

 nized to a similar critical study of the species to be genericaUy iden- 

 tified, and that due attention shall be paid to the rules of zoologic 

 nomenclature as expressed in the International Code. I wiU point out 

 in passing that there are in the United States National Museum 10 

 specimens of the coral to which Reuss apphed the name Cyailiopliyllia 

 annulata. It would be too great a diversion to give in this place a 

 discussion of the literature on this species. This is a fungid coral, 



1 Vaughan, T. W., Some shoal- water corals from Murray Island (Australia), Cocos-KeeUng Islands, and 

 Fanning Island, Carnegie Inst. Washington Pub. 213, see especially pp. 67-72, 1918. 



2 Vaughan, T. W., Recent Madreporaria of the Hawaiian Islands and Laysan, U. S. Nat. Mus. Bull. 

 No. 59, pp. 32-34, 1907. [The list referred to has been slightly revised and the number reduced by 2 names.] 



3 Fabiani, R., II paleogene del Veneto, R. Univ. Padova Inst. Geol. Mem., vol. 3, pp. 229-231, 1915. 



