— 106 — 



6. *1— 3 Isthmia 



*4 Isthmia 



*5 Isthmia 



6 Syringidium eximum Grün. 



7 Heibergia Barbadensis Grev. 



8 Porpeia quadriceps Bau. 

 9 — 11 Biddulphia simplex Shad. 



12—15 * Toumeyi Bail. 



*16 Biddulphia 

 *17 Kittonia 

 *18 Coscinodiscus 



19 * oblongus Grev. 



20 Porodiscus oblongus Grev. 



21 Melosira sulcata Kg. 



22 * radiata Bright. 



23 Asterolampra aliena Grev. 



24 Melosira radiata Bright. 



25 * arenaria Moore. 



26 * radiata Bright. 



27 ? clavigera Grün. 



7. 1 — 3 Arachnoidiscus Grevilleanus Hardm. 



4 * Ehrenbergii Bail. 



5 * Grevilleanus Hardm. 

 *6 — 7 Arachnoidiscus 



8 Aulacodiscus inflatus Grev. 

 *9 Aulacodiscus 



10 * angulatus Grev. 



11 * radiatus Grev. 

 *12 Aulacodiscus 



13 = Barbadensis Ralfs. 



14 * radiatus Grev. 



15 * Barbadensis Ralfs. 



16 Eupodiscus minutus Grev. 



17 Auliscus parvulus Grev. 



18 Aulacodiscus Barbadensis Ralfs. 



19 Auliscus nebulosus Grev. 



20 * elaboratus Ralfs. 

 *21 Coscinodiscus 



22 Endyctia oceanica Ehr. 



8. 1 — 3 Actinoptychus Ranunculus Brun. 



4 * undulatus Ehr. 



5 * areolatus Ehr. 



