14 CATALOGUE OF THE 



Helopora (Bythopora) dendrina, James. 

 *Helopora (Bythopora) meeki, Janaes. 

 *Helopora (Bythopora) parvula, James. 

 *Ilelopora (Arthroclema ?) tenuis, James. 

 *Hippothoa delicatula, James. 

 *Hippothoa (Alecto) inflata, Hall. 



Intricaria clathrata, Miller and Dyer. 

 *Ptilodictya acuminata, James. 



Ptilodictya antiqua, James. 



Ptilodictya birgunensis, Ulrich.§ 

 *Ptilodictya cincinnatiensis, James. 

 *Ptilodictya cleavelandi, Jame^ 



Ptilodictya clintonensis, James. 



Ptilodictya dubia, James. 



Ptilodictya (Arthropora) emacerata, Nich. 

 ♦^^Ptilodictya falciformis, Nich. 



Ptilodictya fenstelliformis, Nich. 

 *Ptilodictya (Heterodictya) flabella, Ulrich.§ 



Ptilodictya flagellum, Nicholson. 

 ^Ptilodictya flexuosa, James. 

 tPtilodictya (Arthropora) fragalis, Billings. 



Ptilodictya grahami, James. 

 *Ptilodictya granulosa, James. 

 ^Ptilodictya hilli, James. 



Ptilodictya (Arthropora) internodia, Miller & Dyer. 



Ptilodictya kentuckyensis, James. 



Ptilodictya latirama, Ulrich.§ 

 ^ Ptilodictya (Heterodictya) maculata, Ulrich.§ 



Ptilodictya (Heterodictya) magnifica, S. A. Miller. 



Ptilodictya monticulipora, Dennis. 

 ■^Ptilodictya (Arthropora) nitidula, Billings. 



Ptilodictya (Heterodictya) nodosa, James. 

 ^Ptilodictya parallela, James. 



Ptilodictya perelegans, Ulrich. 



Ptilodictya (Heterodictya) plumaria, James. 



Ptilodictya (Heterodictya) ponderosa, Ulrich. § 

 / ^Ptilodictya (Arthropora) shafteri, Meek. 



