127 



Distinguishing- ( 'liar- 

 acters. — Elongated, cvl- 

 i 11 cl r i c o - 1 u r b i 11 a t e , 

 .straight or slightly 

 curved form; thin, but 

 strongly wrinkled, e})i- 

 theca ; moderate depth 

 of calyx, with faint in- 

 dications of septal ridges 

 about its sides; irregular 

 vesicular tissue, dense 

 near the Avail, coarser 

 near the center. 



Found in the eornl 

 layer and above it in the 

 lower Moscow shales, at 

 Section 5. 



Cystiphyllum yari- 

 ANS. Hall. (Fig. lOA.) 

 (in.Dev.Foss.,pl.XXIX., 

 1876.) 



Dis t ingi 1 isJi ing Cli n rac- 

 ters. — Irregular cylindri- 



fnl ni- fnnir-nl form vnrx'- Fig. 10. Ci/sfi/pJu/ltnm'.americanuni. Aspecimen 

 Lcti in ^uiiiucu luiiii, vdij jj.^j^^ ^j^^ ^^^.^^ jjj^,gj. Qj Sections. Natural size. 



ilio- P'reatlv" coarse stud. Pal. Coll. Harv. Unlv. cat. 233. (Original.) 



wrinkled epitheca, which, near the base, is 

 often produced into irregular projections 

 wliich serve to cement the coral to a shell 

 or other foreign object ; moderately deep 

 funnel-shaped calyx, its floor formed by 

 the upper surfaces of the cysts, septa in 

 the form of radiating ridges. Interior 

 structure cellulose, the cysts of moderate 

 size and arranged in cup-in-cup manner. 



Found in the Hamilton group of Eigh- 

 teen Mile Creek. (Coll. Am. Mus. Nat. fig. ioa. cystiphyiium 



TT- j_ X' -IT 1 V rarinns. A small specimen 



Hist. .New iork. ) (after Hall). 



