128 

 Genus CYATHOPHYLLUM. Goldfuss. 



[Ety. : Kuatlios, cup: phyllon, leaf (septum).] 

 Corallum simple or compound; the individuals conical, 

 conico-cylindrical, or prismatic and closely crowded, forming 

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

 the larger extending to the center, where they are twisted 

 into a pseudo-columella. 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. 



Cyathophyklum conatum. Hall. ( Fig. 

 10B.) (111. Dev. Foss., PI. XXXI.. 1876.) 



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. iob. Cya- wrinkled epitheca ; numerous closely crowded 

 !/'/;/;/'.^"'Lterai irregular tabulae bending down at the periphery ; 



and calicinal view -it • • • 1 1 



of a smaii sped- well developed dissepiments m peripheral zone. 



men (after Hall). , __. .. p tt l * 



' Found in the Hamilton group oi Eighteen 

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



Gents HADROPHYLLUM. E. and H. 



[Ety. : Hadros, mighty; phyllon, leaf (septum).] 

 (Brit. Foss. Corals, p. lxvii., 1850.) 

 Corallum simple, short, cushion-shaped, with the lower part 

 covered by an epitheca. Calyx superficial, with three septal 

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

 stout, numerous, approaching radial arrangement which is 

 however imperfect. Tabula- and dissepiments wanting. 



Hadeophyllum woodi. sp. nov.* (Fig. IOC.) (Com- 

 pare Amplexus ( '.') intermittens. ) 



* Named in honor of Miss Elvira Wood, Instructor in Palaeontology, Mass. Inst. Tech- 

 nology. 



