164 EOCENE AND LOWER OLIGOCENE COEAL FAUNAS. 



Along the sides of the middle line of the septa the micro-fibers diverge 

 inward and converge outward along the middle of the septum. Both true 

 and false synapticulje are present. The lower part of the coi-allum is filled 

 by the continuous thickening of the skeletal elements in that portion of the 

 corallum. The columella is a spongy mass composed of calcification centers 

 that fuse by processes among tliemselves and also sometimes to the septa; 

 but which appear entirely independent of septal trabeculae. There seems 

 absolutely no order in the arrangement of the larger granules in the septal 

 sides. 



Balanophyllia elongata sp. nov. (vide infra). 



The character of the wall, relations to costee, septal structure and char- 

 acter of columella are practically the same as in B. irrorata. Quite often 

 calcification centers, apparently independent of the septa and arranged 

 irregularly around these distal ends, are seen. By a rapid thickening of all 

 the distal elements, a solid wall is formed. By a thickening of the septa, 

 etc., the whole basal part of the columella becomes almost solid. 



Miss Ogilvie, in her work already alluded to, has given so detailed a 

 description of Eupsammia trochifonnis that it is not necessarj' to add other 

 notes here. 



Balanophyllia desmophyllum Milue-Edwards and Haime. 

 PI. XVIII, figs. 11 to 13a. 



184S. Balanophyllia desmophyUum Milne-Edwards and ITaime. Mon. des Eupsam- 



inides: Annates sci. nat., 3d ser., Vol. X, p. 8C. 

 1850. BalanopliyUia desmophyUum Milne-Edwards and Haime. Mon. Brit. Foss. 



Corals, Pala'ontogr. Soc., pp. 35-30, pi. vi, figs. 1 and la-lc. 

 1857, BalanopliyUia desmophyUum Milue-Edwards and Haime. Hist. Nat. des Corall., 



Vol. Ill, p. 102. 

 1881. Balanophyllia desmophyllum Quenstedt. Eohren- und Sternkorallen, p. 1042. 



Form subflabelliform, attached by a short pedicel, transverse outline 

 elongate elliptical. Calice rather deep. Septa thin, in five cycles. The 

 members of the first and second C3^cles with j^i'ominent u]>per margins. 

 The margins of tlie thn-d also exsert, liut not to so great a degree as in 

 the first and second cycles. The members of the fourtli cycle have the 

 least prominent margins. Those of the fifth cycle meet and unite in 

 front of the fourth and then fuse to the sides of the tliird. They are very 

 perforate. Their surfaces granulate. There are no dissepiments. Costse 



