LUN. — MEG.] 



CCELENTERATA. 



195 



> v f> <n o _ iri n r 'pPn ,», 

 *<•> .pV.%! 



*p>o «c><r> ^ ^©ay.' 



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, 



McC h e s- 



ney, 1860, 



(Cyathax- 



onia pro- 



1 i f era, ) 



New Pal. 



Foss., p. 



75, and Pal. E. Neb., p. 144, 



Coal Meas. 

 Fig. 187.— Lo- Lunatipora, Winchell, 1866, 

 phophyllum Rep. Low. Penin. Mich, 

 proliferum. p gg_ r_ Ety# l unatus< cre8 - 



cent-formed ; poros, pore.] Massive or 

 with corallites consolidated ; corallites 

 long, curving outward from an imagin- 

 ary axis ; walls double ; tabulse 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 ccenenchyma ; septa 

 12 ; tabulae irregular. Type L. americana. 



'*> © *i J ? a m n <*> £<•> a/ 1 _5*_ftJ 





o <r> ^JPjT' a ~ a 



ft f> _ _ a a<*)"a rt ( 



i a a r> a ^r. 



, m « °« ft ® « Jr 



A** 1 A. _ A(*J ^ 

 1 .,» A A " <*> A A 



«,<»><*><»> a "i a A _<*! 



Fig. 



Fig. 188.— Lyellia americana. 



americana, Edwards & Haime, 18il, 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. 



Megalograptus welcln. Cylindrical part of the body 

 depressed, showing cells. 



papillata, Rominger, 1876, Fops. Corals, 

 p. 16, Ni- 

 agara Gr. 



p a rvi t u b a, 

 Rominger, 

 1876, Pal. 

 Foss. Cor- 

 als, p. 17, 

 N iagara 

 Gr. 



Madrepora 

 r e p e n s, 

 Troost. 

 Not satis- 

 factorily 

 defined. 

 Megalograp- 

 tus, S. A. 

 Miller, 

 1874, Cin. 

 Quar.Jour. 

 Sci., vol. 1, 

 p. 3 4 3. 

 [Ety. me- 

 gale, large ; 

 grapho, I 

 write.] 

 Very large 

 cylin d r i - 

 cal, bear- 

 ing fronds 

 with spi- 

 nous pro- 

 cesses,and 

 covered 

 with cellu- 

 lar open- 

 ings. Type Fig. 190.— Megalograptus welchi. 

 M. welchi. Frond, showing cells and spi- 



welchi S. nons processes. 



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

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



