266 Narrikal or Cochin Mud Bank, [No. 12, new series. 



description of these minute organisms that has been yet pub- 

 lished. 



CLASS CRYPTOGAMIA. 

 Sub group Diatome^ or Diatomace^e. 



FAMILY I. — EUNOTIiE. 

 Genus EPITHEMIA (Kutz,) 

 Epithemia argus (Ehr. Kutz.) 

 Genus EUNOTIA, (Ehr.) 

 Eunotia diadema (Ehr.) 

 Genus HI M ANTIDIUM (Ehr.) 

 Himantidium undulatum (Sm.) 



FAMILY IV. — FRAGILARIEyE 

 Genus NITZSCHIA (Hass, Sm.) 

 Nitzschia sigmoidea (Nitzsch. Sm.) 



N. sigma (Kutz, Sm.) 



N. lanceolata (Sm.) 



FAMILY V.— SURIRELLE^E. 

 Genus SYNEDRA (Ehr.) 

 Synedra ( ? Sp. ) 

 Genus TRYBLIONELLA (Sm.) 

 Tryblionella ( ? Sp. ) 

 Genus. SURIRELLA (Turp. E. S.) 

 Surirella fastuosa (Ehr.) 

 Genus CAMPYLODISCUS (Ehr. Men ) 

 Campylodiscus splendida (N. S.) 



FAMILY VI. — STRIATELLEiE. 



Genus TABELLARIA (Ehr.) 

 Tabellaria fenestrata (Lyng. Kutz.) 

 Genus GRAMMATOPHORA (Ehr.) 

 Grammatophora marina (Lyng. Kutz.) 



FAMILY ViX — MELOSIREiE. 

 Genus CYCLOTELLA (Kutz.) 

 Cyclotella astraea (Ehr. Kutz.) 



C. ■ (? Sp.) 



Genus MELOSIREiE (Ag.) 



Melosira marina ? (Orthosira marina. Sm. ?) 



