CALCAREOUS AT.G«. 



49 



11. Lithopln/lhim tamienae Heydrich. New Guinea. 



12. Aiiipliii-dd frdi/ilissima Lamouroux. [/cmon Hay, near Guanica, Porto Rico. 



13. PhymitloUlhitn compactnm Fo.slie. Torbay, Newfouiuiland. 



14. Goniolithoii acropetuin Foslic and Howe. Culebra Island, Porto Rico. 



15. Goniolithon slrictum Foslie. Bernini IIarl)or, Baliamas. 

 10. Goniolithon strictum. Soldiers Key, Fla. 



Tlie iictual analyses are as follows: 



Analyses of algse. 



The low summation of No. 12, a very fragile form, is due to inclosed salts, mainly alkaline 

 clilorides and sulphates. These were detennined as 5.40 per cent, which hrings the summation 

 up to 100.40. 



Reducing the analyses, as usual, to standard form, we have the following table: 



Reduced analyses of algx. 



