LUN. MEG.] 



CGELENTERATA. 



195 



centiform columella 

 occupies the center 

 of the calice, and 

 is in continuity by 

 one of its ends with 

 a small septum 

 placed in the middle 

 of the septal fossula, 

 and by the other end 

 with the opposite 

 primary septum. 

 Type L. konincki. 

 calceola, see Zaphrentis 



calceola. 



expansum, White, 

 1876, Proc. Acad. Nat. 

 Sci. Phil., p. 27, and 

 Cont. to. Pal., No. 6. 

 p. 157, Keokuk Gr. 



proliferum, 

 McChes- 

 ney, I860, 

 (Cyathax- 

 onia pro- 

 lifera,) 

 New Pal. 

 Foss., p. 

 75, and Pal. E. 



-Megalograptus welchi. Cylindrical part of the boJy 

 depressed, showing cells. 



Neb., p. 144, 

 Coal Meas. 

 FIG 187 Lo- LUNATIPORA, Winchell, 1866, 

 pliophyllum Rep. Low. Penin. Mich. 

 proliferum. p> 89> [Ety. lunatus, cres- 

 cent-formed; poros, pore.] Massive or 

 with corallites consolidated ; corallites 

 long, curving outward from an imagin- 

 ary axis ; walls double ; tabulae present ; 

 no mural pores. Type L. michiganensis. 

 michiganensis, Winchell, 1866, Rep. Low. 



Penin. Mich., p. 89, Ham. Gr. 

 LYELLIA, Edwards & Haime, 1851, Mon. 

 Pol. Foss. Terr. Pal., p. 226. [Ety. proper 

 name.] Corallum massive ; corallites 

 cylindrical; walls thick, costulated, 

 free toward their terminations, and 

 united by vesicular coenenchyma ; septa 

 12 ; tabulae irregular. Type L. americana. 



FIG. 188. Lyellia americana. 



americana, Edwards & Haime, 1851, Mon. 



Pol. Foss. Terr. Pal., p. 226, Up. Held. Gr. 

 decipiens, Rominger, 1876, Foss. Corals, 



p. 17, Niagara Gr. 

 glabra, Owen, 1840, (Sarcinula glabra,) 



Rep. on Minn. Lands, p. 70, Niagara Gr. 



papillata, Rominger, 1876, FOPS. Corals, 



p. 16, Ni- 

 agara Gr. 

 p a rvi tuba, 



Rominger, 



1876, Pal. 



Foss. Cor- 

 als, p. 17, 



Niagara 



Gr. 

 Madrepora 



r ep ens, 



Tr oost. 



Not satis- 

 factorily 



denned. 

 MEQALOGRAP- 



TUS, S. A. 



Miller, 



1874, Gin. 



Quar.Jour. 



Sci., vol. 1, 



p. 343. 



[Ety. me- 



gale, large ; 



grapho, I 



write.] 



Very large- 



cylin d r i - 



cal, bear- 

 ing fronds 



with spi- 



nous pro- 



co vered 

 with cellu- 

 lar open- _ 

 ings. Type FIG. 190. Megalograptus welchi. 

 M. welchi. Frond, showing cells and spi- 

 welchi.S. noas processes. 



A. Miller, 1874, Cin. Quar. Jour. Sci., 

 vol. 1, p. 343, Hud. Riv. Gr. 



