137 



(Fig. 

 Pis. 



21.) {Cluf'tetf^s 

 XXXYIl. and 



of the In-aiiches: calices of nioutieules larger than those on 

 remainder of branches; tal)- 

 iilfe remote, except near the 

 surface, where they are nu- 

 merous. 



Found in tlie ^Ioscoav 

 shale, three to five feet 

 above the Encrinal lime- 

 stone, at Section ."i ; also in 

 the Demissa bed of Section 

 5 ; between ten and fifteen 

 feet below the Encrinal lime- 

 stone, at Section 7, and in 



,1 T-vT T i 11 i- Fig. M. Monofn/pa fraticaMt. A specimen 



the Jr^leurOaiCtVUm beds OI of the natural size, "andaportiun of the surface 

 , ) n 1 ,' J 1 \ enlarged (after Hall). 



Avery s (^reek (rather rare). 



MOXOTRYPA (?) FURCATA. (Hall.) 



fiirratus. Hall. 111. Dev. Foss., 

 XXXYHI.) 



Distinguishing Chnracters. — Branch- 

 ing form similar to the preceding, 

 from which it differs chiefi}' in the 

 absence of the monticules, and in the 

 transversely-ridged a})pearance of the 

 corallites. (On a number of speci- 

 mens, apparently of tliis species, 

 spines or acanthopores occur at the 

 angle of junjction of the corallites, 

 a feature which would demand the fig. 21. Monotnjpa {.-!) fur- 



. , cnta. A specimen of the natural 



removal 01 the species to another size, and a portion of the 



^ surface enlarged (after Hall). 



genus. See Ulrich, Paleozoic Bryozoa, 



Palaeontology of Illinois, Vol. VIII., Part II., Section (>, 1890.) 

 Found in the Demissa bed, at Section 5, and two to four 

 feet below the Trilobite beds, at Avery's Creek. 



MoXOTIiYPA AMPLECTEXS. S]). IIOV. (Fig. 22.) 



Distinguishing Clianicters. — Encrusting habit; uniform, 

 rather large, and regularly distributed monticules, the calices 

 of which are larger than those of the main mass; small, new 



