20 



COSCINODISCUS Ehrb. 

 C, excentricus Ehrb. 



Queens: Arverne, Edwards. 

 C. asteromphalus Ehrb. 



Queens: Arverne, Edwards. 

 C. lineatus Ehrb. 



Queens: Arverne, Edwards. 

 C. nodulosus Grtin. 



Queens: Arverne, Edwards. 



ACTINOPTYCHUS Ehrb. 

 A. undulatus Ehrb. 



Quee7is: Arverne, Edwards. 



AULACODISCUS Ehrb. 

 A. Germanicus Ehrb. 



Queens: Arverne, Edwards. 



ACTINOCYCLUS Ehrb. 

 A. Ehrenbergii R. 



Queens: Arverne, Edwards. 



EUPODISCUS Ehrb. 

 E. radiatus Bail. 



Xings : Coney Island, Woodman. 



AULISCUS Ehrb. 

 A. caelatus Bailey. 



Queens: Arverne, Edwards. 

 A. pruinosus Bailey. 



Queens: Arverne, Edwards. 

 A. radiatus Bailej?-. 



Queens: Arverne, Edwards. 



RHIZOSOLENIA Ehrb. 

 R. gracilis Ehrb. 

 Frequent. 



TRICERATIUM Brightwell. 

 T. alternans Bailey. 



Kings : Coney Island, Woodman. Queens : Arverne, Edwards. 

 T. favus Ehrb. 



Queens : Arverne, Edwards. 

 T. punctatum Brightwell. 



Queens: Arverne, Edwards. 

 T. maculatum Kiitz. 



Queens: Arverne, Edwards. 



BIDDULPHIA Gray. 

 B aurita (Lyngb.) Breb. 



Queens: Arverne, Edwards. 



