DISTRIBUTION OF SPECIES. 23 



PROBABLE BATHYMETRIC DISTRIBUTION OF SPECIES. 



The studies of various paleontologists and the results of the studies of 

 the bathymetric distribution of recent corals have shown that the fossil 

 coral faunas furnish consideralile data concerning' the conditions of depth 

 under which deposits containing such fossils were laid down. Using the 

 data which have been accunuilated from tkedgings an attempt is made to 

 show the probable depths at which the various beds containing fossil corals 

 herein described were deposited. 



Genera represented in the Eocene of the United States and depths at tchich they now live,^ 



Fathoms. 



Flabelliuu Shallow water to 1, 500 



Aldrichia gen. nov. 



Sphenotroclius Shallow water to 150 



Platytrochus, probably extiuct. 

 Discotrocbus. extinct. 



Turbinolia.^ 100- 220 



Trochocyathus 100- 750 



Paracyatluis Shallow water to 750 



Caryophyllia Shallow water to 1, 500 



Steriphonotrochus gen. nov. 



Parasmilia ^0- 300 



Astrohelia, extinct. 



Oculina Shallow water to 50 



Aiuphihelia- 158- 892 



Cielohelia gen. nov. 



Stylophora - Shallow water. 



Madracis 38- 300 



A.strauo-ia Shallow water to 315 



Oladocora Shallow water. 



Pavia Shallow water. 



Dichoccenia Shallow water. 



Haimesiastrtea gen. nov. 



Astrocoenia Shallow water. 



Platycceuia gen. nov. 



Stephanoctjenia Reef. 



Siderastrea Eeef. 



Stephaiioiiiorpha gen. nov. 

 Mesomorpha, extinct. 



'Most of the (lat.a here given have been taken from Moseley's Deep sea corals, in the Challenger 

 Reports, Zoology, Vol. II, Pt. VII, 1881, pp. 132, 133. 



» Pourtales, Bull. Mus. Comp. Zoul. Harviird Coll., Vol. VI, No. 4, 1880, p. 96. 



