TYPE SPECIMENS OF PALEOZOIC FOSSILS 21 



Dictyophyton t e I u m see Prismodictya telum 

 Dictyophyton tenue see Tylodictya ? tenuis 

 Dictyophyton tomaculum^^ Clathrospongia? 



tomaculum 

 Dictyophyton tuberosum see Hydnoceras 



barroisi 

 Dictyophyton tuberosum see Hydnoceras 



tuberosum 

 Dictyophytum ramosum see Botryodictya 



ramosa 

 Ectenodictya eccentrica see Acloeodictya (?) 



eccentrica 

 Ethmophyllum rarum see Archaeocyathellus 



rarus 



Ethmophyllum rensselaericum see Archaeo- 

 cyathellus rensselaericus 



HALLODICTYA Hall & Clarke 

 Hallodictya cottoniana Hall & Clarke 



95 -. i 8 -- TYPE Hallodictya cottoniana Hall & Clarke. 

 New York state museum memoir 2. 1898. p. 142, pi. 41, 

 fig. 12. 



Chemung beds Cotton hill, near Avoca N. Y. 



Hallodictya sciensis Hall & Clarke 



96 ^j 2 - 1 PLASTOTYPE Hallodictya sciensis Hall & 

 Clarke. New York state museum memoir 2. p. 140, 

 pi. 36, fig 8, 



Chemung beds Scio N. Y. 



HELICODICTYA Hall & Clarke 



Helicodictya (?) concordia Hall & Clarke 



,97 2..2JLQ. PLASTOTYPE Helicodictya(?) concordia Hall 

 & Clarke. New York state museum memoir 2. 1898. 

 p. 115, pi. 27, fig. 2. 



Chemung beds Concord station Pa. 



Hyalostelia (?) marcellia see Dictyospongia (?) niarcellia 



HYDNOCERAS Conrad 

 Hydnoceras barroisi Hall & Clarke 



.98 2.3.20. PLASTOTYPE Dictyophyton tuberosum Barrois. 

 Annales de la Societe" geologique du nord. 11:82, pi. i, 

 fig. la-e. 



