128 



Gents CYATHOPHYLLl'.M. Goi.dfuss. 



[Ety. : Knathds, cup; jihi/Uo/i, leaf (septum).] 

 Coralluni simple or comjiouiid ; the iiidividnals conical, 

 conico-cylindrical, or prismatic and closely crowded, forming 

 astrtei-form heads. Septa well developed, radially arranged, 

 the larger extending to the center, where they are twisted 

 into a psendo-cohimella. Costa' absent. Tabulae present, 

 but only in the center of the visceral chamber, the outer area 

 being filled with vesicular dissepiments. Ex- 

 terior covered with an epitheca. Asexual re- 

 production by calicinal or lateral gemmation. 



GVATHOPIIYLLUM COXATTM. Hall. ( Fig. 



lOB.) (111. Dev. Foss., PI. XXXI., 187(;.) 



Distinguishing Characters. — Irregular, cylin- 

 drical or conico-cylindrical growth, often vari- 

 ously bent; frequent constrictions, leaving the 

 septate rim of the older calice projecting around 

 the base of the newer one: well developed 

 alternating, radiating septa; rather smoothly 

 Fig. lOB. ctia- wriulvlcd cpithcca ; numerous closely crowded 



fllOpllt/Uuill full' . - 1 1 1 T 1 I • 1 



atwu. Lateral irrcgular ta oulte bendmgdownat theperiplierv ; 



and calicinal view ' . .. ii.^- 



of a small speci- well devcloped dissepimeiits in peripheral zone. 



men (after Hall). ^ >■ ^ ^^ 



Found in the Hamilton group of Eighteen 

 Mile (reek. (Coll. Am. Mus. Nat. Hist. New York.) 



Genus HADROPHYLLUM. E. and H. 



[Ety. : Hddros, mighty; x>hyllon, leaf (septum).] 

 (Brit. Foss. Corals, p. Ixvii., 18.j0.) 

 Corallum simple, short, cushion-shaped . \\'ith the lower part 

 covered by an epitheca. Calyx superficial, with three septal 

 fossulae, that of the cardinal septum being the largest. Septa 

 stout, numerous, approaching radial arrangement which is 

 however imperfect. Tabuhp and dissepiments wanting. 



Haukophvlu-.m woodi. sp. nov.* (Fig. IOC.) (Com- 

 pare .4 /iJ/y/cA/ZN {'.') intennittens.) 



*Xamecl in honor of Miss Elvira Wood, Instructor in PalEeontology, Mass. Inst. Tecli- 

 tiology. 



