100 



Marine Microbiology 



TABLE 3 



Growth ix Medium Containing Organic Nitrogenous Compounds, as 

 Per Cent of Growth in Medium Containing Nitrate 



Species 



Glutamic 

 Acid 



Glutamine Glycine Urea 



Uric 

 Acid 



Carteria (?) sp. BT-2 

 Chaetoceros sp. (BB sm) 

 Chaetoceros lorenzianus 

 Chaetoceros pelagicus 

 Coccolithus huxleyi (BT-6) 

 Coccolithus huxleyi (?) (BT-5) 

 Coccolithus huxleyi (92-A) 

 Cyclotella nana (13-1) 

 Nitzschia seriata 

 Skeletonema (?) sp. (Men 5) 



Coscinodiscus asteromphalus 

 Cyclotella caspia (10-5) 

 Cyclotella nana (7-15) 

 Rhizosolenia setigera 

 Skeletonema costatum 

 Thalassiosira nordenskioldii 



Cyclotella nana (3H) 

 Detonula confervacea 

 Flagellate o+ 

 Flagellate ^"• 

 Melosira sp. (0-8) 

 Thalassiosira fluviatilis 



* Cultures continued to grow significantly. 

 ** Cultures attained a significant yield later. 



# Variable growth, due to bacterial action on the urea. 

 + NH4C1 used instead of NaNO;,. 



On uric acid, only two of the presumably oceanic algae— 

 Coccolithus huxleyi (clone 92-A) and Skeletonema (clone Men 

 5)— attained a yield over 5 per cent of tliat on nitrate. On the 

 other hand, all the coastal and estuarine species except Rhizo- 

 solenia reached yields of at least 12 per cent and six of the twelve 

 species grew at least as well on uric acid as on urea. 



