BULL. GEOL. SOC. AM. 



VOL. 24, 1912, PL. 35 





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Figure 1. — A Fragment of a modern stony Colony of calcareous Alg^e (Lithophyllum 



ANTILLARUM, FOSLIE AND HOWE) 



This specimen from Porto Rico is about 6 inches wide. Reproduced through the courtesy of Dr. 

 Marshall A. Howe, New York Botanical Garden 



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Figure 2. — Varieties of stony calcareous Ai.ck from the Imhw Oci ln 



Reproduced from the report on "Fauna and Geography of the Maldive aud Laccadivo Archipelagoes, 



by Gardner, Foslie, and others 



CALCAREOUS ALG/£ 



