Buthograptus Hall (alga). 



Callithamiiopsis Whitfield (alga). 



Chsetocladus Whitfield (alga). 



Corematocladus Euedemann (alga). 



Cryptozoon Hall (alga). 



Girvanella Nicholson and Etheridge (alga). 



Nematophycus Carruthers. 



Oldhamia Forbes (alga?). 



Peronosporites Smith. 



Phytopsis Hall 



Primicorallina Whitfield (alga). 



Protostigma Lesquereux. 



Sphaerococcites Sternberg. 



Solenopora Billings (alga). 



Sphenophyllum Koenig. 



Sphenophycus Ruedemann (alga). 



Wingia Seely (possibly algal in part). 



See also under Sponges for other possible algae. 



"FUCOIDS.' 



Arthraria Billings. 

 Blastophycus Miller and Dyer. 

 Boliviana Salter. 

 Buthotrephis Hall. 

 Chondrites Sternberg. 

 Cruziana D'Orbigny. 

 Dactylophycus Miller and Dyer. 

 Discophycus Walcott. 

 ?Discophyllum Hall. 

 Dystactophycus Miller. 

 Heliophycus Miller and Dyer. 

 Ichnophycus Hall. 

 Licrophycus Billings. 

 Lockeia James. 

 Palaeophycus Hall. 

 Rusophycus Hall. 

 Trichophycus Miller and Dyer. 



BIOLOGICAL CLASSIFICATION. 1427 



PLANT KINGDOM. 



ALGJE, etc. 



