CONTENTS. 



XIX. 



Genus 172. 



Genus 173. 



Genus 174. 



Genus 175. 

 Genus 176. 



Genus 177. 

 Genus 178. 

 Genus 179. 

 Genus 180. 

 Genus 181. 



Genus 182. 



Genus 183. 

 Genus 184. 

 Genus 185. 

 Genus 186. 



Genus 187. 



Genus 188. 



Genus 189. 



Genus 190. 

 Genus 191. 



Radiopalma Brun, 1 89 1 . 



Tribe XXV. Coscinodisce/E 



Sec. I. Pyxidetz. 

 Pvxidicula Ehr., 1833 



Dictyopyxsis Ehr. 



Liradiscus Grev., 1865 



Epithelion Pant., 1894. 



Xanthiopyxis Ehr., 1844 . 

 gossleriella schutt, 1 893 



Sec. II. BrighttoeUiece 

 Brightwellia Ralfs, 1 86 1 

 Heterodictvon Grev., 1863 

 Craspedodiscus Ehr , 1844 

 Porodiscus Grev., 1S63 . 

 Brunia Tempere, 1890 



Sec. III. Acanlhodiscece . 

 Acanthodiscus Pant., 1892 



Cotyledon Brun., i8qi. 

 BruniellaH.V.H., 1896. 



Sec. IV. Hyalino-Radiece. 

 Stephanodiscus Ehr., 1855, Emend. Grun. 

 Cosmiodiscus Grev., 1866 . 

 Anisodiscus Grun., 1886 . 

 Acting-cycles Ehr., 1840 . 



Sec. V. Eu-Coscinodiscece . 



Coscinodiscus Ehr., TS38 . 



Plank'ionielea Schutt, 1893 



Antelminellia Schutt, 1893 



Ethmodiscus Castr., 1886 Valve 

 striae 



Havnaldiella Pant., 1S92 Valve w 



Janischia Grun., 1882 



Stoschia Jan. in Litt. 



WlLLEMOESIA CASTR., 1 886 



Sec. VI. Htmidiscece 

 Euodia Bailey, i860 



Hemidiscus Wallicb, i860. 



Palmeria Grev., 1865 

 Leudugeria Tempere, 1893 



Eunotiopsis Grun. 



Euodia Grun. (non Bailey). 



with very delicate 



th flammiform striae 



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515 

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521 



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522 

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 525 

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555 

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538 

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