NO. 1193. SOME NEOCENE CORALS— GANE. 187 



the costsie, inclined, and forming cells. In the largest specimens tbe 

 calicular area is somewhat less than that of a transverse section of the 

 coral about 15 mm. below the margins. Oalice variable in shape from 

 quiteoval to com pressed, sometimes constricted centrally, approximating 

 in shape the figure eight; it is shallow and jiresents a wavy margin on a 

 nearly even plane in the adult, uneven in the young. The fossa is deep 

 and narrow. There are six systems with tive complete cycles of septa, 

 and in the adult individuals sometimes several orders of a sixth. The 

 septa are crowded, often curved, a little thicker at the wall than else- 

 where, marked on their upper edges with a very slight serration of 

 small papillie; the sides have radiating rows of granules which merge 

 with those on the costse; this regularity of granular arrangement is not 

 so marked in the vicinity of the lower part of the fossa. Columella 

 long, dense, and spongy. ' Endotheca abundant. 



When comparing the coral at different stages in its growth, this 

 species is very variable in shape. In the young forms, we find the 

 corallum more conical than turbinate, more strongly attached, and 

 its calice much more oval and not at all resembling the figure eight in 

 outline. The margin of the calice is more sinuous, witli the longer axis 

 more depressed than the shorter. Epitheca less prominent. Septa in 

 only four cycles, straighter and less crowded. Fossa deeper than in the 

 adult form. 



The number of specimens examined by the writer is numerous, rep- 

 resenting quite a series of individuals of most varied size and shape. 

 Had either of several extreme types occurred alone without the con- 

 necting forms it might well be considered as a distinct species. 



The young are but slightly, if at all, bilobed, the most matured indi- 

 viduals alone being turbinate and vertically constricted with a figure 

 eight shaped calice, the latter characteristics being described by Pro- 

 fessor Duncan as typical of the West Indian forms. 



Dimensions. — Thedimensions of the largest specimens are : Height, 50 

 mm.; greatest length and least width of calice, respectively, 59 and 25 

 mm. When comparing the above measurements with those of the 

 largest specimens from Santo Domingo, the latter are found to be far 

 larger in size than the forms occurring in Florida. 



Geological horizon. — Upper Oligocene, Chipola formation. 



Locality. — Bailey's Ferry, (Jhipola River, Calhoun County, Florida; 

 Santo Domingo, Guadeloupe (horizon not given). West Indies. 



Collection. — U. S. National Museum. 



Genus ASTRANGIA Edwards and Haime. 

 ASTRANGIA LINEATA (Conrad). 



1835. Litliodendron lineatus Conrad, Trans. Geo!. Soc. Pa., I, Pt. 2, p. 340, lA. xiii, 



fig. 4. 

 1845. Anthopliyllum Uneatum Lyell, Quart. Jour. Geol. Soc, I, p. 424. 

 184."). Anthophyllum Uneatum Lonsdale, Quart. Jour. Geol. Soc, I, p. 495, fig. a. 

 1845. Caryopliyllia lineata Conrad (Manubcript label), Quart. Jour. Geol. Soc, I, 



p. 495. 



