MADREPORARIAN CORALS 



11 



Fig. 30. — 

 marginal bud. 

 Xat. size. 



Endopachys grayi with a 

 Persian Gulf, 55 fathoms. 



by Gosse as vivid scarlet in the adults, orange in the young 



individuals, opaque ; the tentacles gamboge yellow, the 



hue residing only in the 



warts. 



Endopachys. — The 



genus Endopachys (Fig. 



30) is still a rarity in 



museums, and has not 



been found in any locality 



in large numbers. It is of 



some special interest, how- 

 ever, because in size and 



in form it closely resembles 



the Turbinoliid coral 



Flabellum, and, like 



Flabellum, it is attached 



to a stone or shell when 



it is young, but becomes 



free by fracture of the base in the later stages of its growth. 



A critical examination of a specimen, however, shows that 



it is thoroughly perforate 

 and that the septa have an 

 Eupsammiid arrangement 

 (Fig. 31). One or two 

 specimens only have been 

 found in such distant 

 localities as the Persian 

 (lulf, Hawaii, the Malay 

 Archipelago, and Manilla, 

 but the genus is repre- 

 sented by several species, 

 and is very abundant in 

 some of the Eocene de- 

 posits of the United States 

 of America. 



Endopachys and Fla- 

 bellum present us with an excellent example of the 



principle known as " convergence in nature." There can 



be no doubt that they are not closely related, and 



Fig. 31. — Diagram to illustrate the 

 septal arrangement of Endopachys. 1,1, 

 primary septa ; II, 11, secondary septa. 



