No. 2] SYSTEMATISEE BEMERKXINGER. 59 



Folgende arter tilharer slegten: 



Subgen. Eulithoporella Fosl. mscr. 



Mastophora subgen. Lithoporella Fosl. 1. c. 



Lithoporella melobesioides Fosl. 



— pacifica (Heydr.) Fosl. 



— atlantica Fosl. 



— conjuncta Fosl. 



Subgen. Lithostrata Fosl. 



Mastophora subgen. Lithostrata Fosl. Alg. Not. II (1906) p. 27. 



Lithoporella lapidea Fosl. 



