202 Phillips . — On the Development of the 
The Pericarp . — Formed chiefly from pericentral cells of the 
fertile joint, but the joints above and below sharing in its 
formation. 
In Rhodomela and Polysiphonia the wall is one cell thick. 
In Chondria and Dasya, several cells thick at the base, 
becoming thinner near the pore. 
In Laurencia , many cells thick throughout. 
The degree of development of the wall corresponds 
roughly with the degree of development of the so-called 
cortex of the vegetative parts. 
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