NO. 1193. SOME NEOCENE CORALS— GANE. 135 



Genus PARACYATHUS Edwards and Hainie. 



PARACYATHUS VAUGHANI Gane. 



(Plate XY, figs. 4-6.) 



1895. Paracyathus vautjhani Gane, Johns Hopkins Univ. Circ, XV, No. 121, October. 

 1895, p. 9. 



Corallum small, broad and low, with the calice about the same diam- 

 eter as the base, above which the wall is somewhat constricted. Wall 

 thin, costulate to its base. Oostte low, unequal, finely granular, more 

 prominent near the calicular margin where they are considerably 

 thicker than their corresponding septa. Calice circular in the young, 

 slightly oval in the adult individual; fossa broad, moderately deep. 

 Septa in six systems of five cycles lacking part of the sixth order of 

 the last cycle; in forms of medium size, only four cycles are present. 

 Primaries and secondaries subequal, thick and stout, with sumuiits 

 more broadly rounded and more strongly exsert than those of the 

 remaining thin and slender septa; sides coarsely granulated, edges of 

 the higher cycles regularly crenately dentate. Pali granular, present 

 before all the septa but those of the last cycle, excepting in the most 

 mature forms, where they may be lacking before a p;irt of the fourth as 

 well as before all of the fifth cycle of septa. Columella papillose, well 

 developed. 



In polishing down the base of the coral, the rings marking tlie ex- 

 istence of previous outer walls are clearly seen. In one specimen no 

 less than eigbt appear, showing the growth of the coral and its rela- 

 tion to the development of its septa. 



The individuals of this form generally occur alone attached to some 

 shell, but occasionally they are found in clusters, being in close contact 

 with one another at their sides or the outer edge of their bases. 



Dimensions. — Height of largest specimen, 4 mm.; breadth of calice, 

 11 mm. 



Geological horizon — Miocene, Chesapeake formation. 



Locality. — Carters Landing, James River, and Yorktown, Virginia. 



Collections. — U. S. I^ational Museum (type); Wagner Free Institute 

 of Science; Johns Hopkins University. 



Family OCULINID^ (part) Edwards and Haime. 



Genus ASTROHELIA Ed^A^ards and Haime. 

 ASTROHELIA PALMATA (Goldfuss). 



1826-1833. Madrepora xmlmata Goldfuss, Petrefacta Germanise, Pt. 1, p. 23, pi. xxx, 



figs. 6, a, b. 

 1834. OcuUna palmata Ehrenberg, Abliand. Berlin, Ak. Wiss. for 1832, pp. 305, 344. 

 1834. Madrepora palmata Blainville, Man. Act. on Zooph., p. 390. 

 1836. Madrepora palmata Lamarck, Hist. Nat. Animaux sans Vert., 2d ed., II, p. 450. 



1848. Oculina palmata Broxn, Index Palajontologicus, I, p. 835. 



1849. Astrhelia palmata Edwards and Haime, Compte Rendus Ac. Sci., XXIX, p. 68. 



