CAL('AKKOU.S MAiJU. 

 Analyses ofalgx. 



51 



1 



SiO„Al,03,Fe.,03-- 



MgC)...! '..... 



CaO 



PA 



SO3.. 



Ignition 



CO, needed 



Organic matter, etc 



0.07 



6.29 



46.16 



Trace. 



.00 



46.70 



0.11 



5.71 



42.39 



Trace. 



.00 



50.97 



0.28 



7.09 



45.92 



Trace. 



.00 



45.72 



99.22 



43.19 



3.51 



99.18 

 39. 59 

 11.38 



99.01 



43.88 



1.84 



Reduced analyses ofalgse. 



These algse arc much lower in magnesia than our specimens from similarly warm regions. 

 The two species of Goniolithon contain little more than half as much magnesium carbonate as 

 the species from Florida and the West Indies. That this difference might be due to differences 

 of age or maturity seemed to be possible, and therefore two more algaj were obtained from 

 Dr. Howe and analyzed by R. M. Kamm with the following results: 



1. LilknphijUuiii pdchyilcrmum, Dollar llarbor. South Cat Bay, Bahamas. 



la. Upper or younger layer, solid. 



lb. Lower or older layer, porous and somewhat discolored. 



2. Goniolithon stridum, Bemini Harbor, Bahamas. 



2a. Upper or younger branches. 

 2b. Lower or older branches. 



Actual analyses of ulgx. 



Reduced analyses of algse. 



la 



lb 



SiO, 0.04 



(Al,Fe),03 12 



MgCOj." I 24.95 



CaCOj ' 73. 65 



CajP-Og Trace. 



Ca.S6t L24 



0.09 



.15 



15. 43 



83.06 



Trace. 



1.27 



100. 00 



100. 00 



2a 



0.02 



.36 



22.98 



75.42 



.00 



1.22 



100. 00 



2b 



0.09 



.63 



23.74 



74. 29 



.00 



1.25 



100. 00 



