.MAI!NI,\\I) (il'Ol.iidlc \l. Sll!\i;V 227 



larity. Tliusc licl'oi'c (lie sfi)|;i of Ihc lirst cycle arc siiiall, and stand 

 not very liii^li al>(t\c Ihc |i;i|iilla(' nf Ihc c(i|iiiiiclhi : those hct'ore the mem- 

 licl'-; of Ihc second ;ire wiile ami Ihili: iho-e hefoi'c the iiieinbers of the 

 third cycle are wvy wiile ami thin, they extend fiillv one-half the dis- 

 tar.ce from Ihe outer limit of the columella |o |hi. wall. The |iali he- 

 foi'c the septa of (he secomi ami thin! cycles ai'elicil n]iward, theii' sides 

 arc granulated in a measure similar to the sides (if the septa, their 

 margins arc enlii'e and t ransvci'sely umlidate. The calieular fosfja is 

 dec]), the bottom is gently concave, 'idu' n|i|iei- sui'face of the colum- 

 ella consists of nnmcTons jiapillac. 



There arc from the Ivx-cnc of the Gulf states two species with 

 which this species should be compared. The first is Paracyathus 

 granulosus Vaiighan from Woods Bluff, Alabama. The septa of the 

 first and second cycles in P. f/ranulosus are much stouter and have much 

 more prominent margins than in P. mari/landicus. The costae of 

 P. granulosus are thicker and are more prominent than in P. mary- 

 landicus. The latter difference will be made clear by comparing the 

 lignres of the latter species given here with the original figures ' of the 

 former. The other is Paracyathus alternatus Yaiighan, from the Lower 

 Claiborne of Louisiana, Mississippi and Texas. It exhibits many points 

 of difference. Its costae and septa are thicker and very much more 

 prominent. The pali are also different. They are stouter and fre- 

 quently are bilobed". P. marylandicus is strikingly different from any 

 other of our Eocene species of Paracyathus. 



Occurrence. — Aqitia Formation. 1 mile northeast of Piseataway. 



Collection. — Maryland Geological Survey. 



Genus BALANOPHYLLIA Searles-Wood. 



Balaxophyllia DESMOPHTLLrii Milne-Edwards and Haime. 



Plate LXL Figs. 10, 11. 



Balanophyllia desmophyllum Milne-Edwards and Haime, 1848, Mon. des Eupsam- 

 mides, Annales sci. nat., 3d ser., vol. x, p. 86. 



1 Mon. U. S. Geol. Survey, No. 39, pi. yiii, fig. 15a. 



2 Op. si;p. cit., pi. viii, flg. lla. 



