129 



DistinguishinL'- Characters. — Coralliim small, 

 turbinate, regularly expanding from the base. 

 CaWx superficial, sub-circular. Cardinal septum 

 aborted, forming the main fossula, which is 

 very broad. The two septa bounding the car- 

 dinal septum reach the center, and the remain- 

 ing septa of the cardinal quadrants unite with 

 these. Alar septa reach center. Lateral fossu- phyiuml woocu. 

 \ve not formed bv the abortion of septa, but bv Biorse creek : nat- 



. ' ural size. (Original.) 



the union, among themselves, oi the septa m the 

 counter quadrants, and their separation from the alar septa. 

 Counter septum not reaching the center. A pseudo-columella 

 is formed by the junction of the longer septa in the center. 



Found in the lower Moscow shale at Eighteen Mile and 

 Morse creeks (rare). 



GExrs CRASPEDOPHYLLUM. Dybowskv. 



[Ety. : Kraxpedos, mii edge; phylloii, leaf.] 

 (Beschr., von neuen Devonischen Arteu der Zoantharia Rugosa, p. 1.53.) 



Corallum simple or fasciculate; corallites commonlv 

 cylindrical, each with a moderately-deep (;alyx and well- 

 developed epitheca. A secondary central wall is present, 

 which is not crossed by the septa, the longer of which join 

 it to the outer wall. Inner area with tabuhe, outer with 

 dissepiments. Ppper edges of septa carinate. 



Craspedophyllum archiaci. Billings. (Not figured.) 

 {DiphyphyUum archiaci. Billings. Canadian Journal, Vol. V., 

 p. 260, Fig. 8.) 



Distinguishing Cliai'acters.— Reads consisting of parallel 

 nearly straight cylindrical corallites, nearly or quite in con- 

 tact with each other; young stems, added by lateral or 

 marginal gemmation ; central tube small, apparently want- 

 ing in some corallites; dissepiments numerous: epitheca 

 showing numerous lines of growth, and sharp-edged annula- 

 tions. Some corallites exhibit sudden constrictions of growth. 



Found in the Hamilton group (Encrinal limestone ?) on 

 the shore of Lake Erie. ( Coll. Am. Mus. Nat. Hist. New York.) 



