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SYNOPSIS OF THE GENERA. 



The native Litliophytes may be arranged under two 

 families : viz. 



I. CoRALLiNAD.E — Calciferous Algse with a branched ar- 

 ticulated frond. 

 Frond trichotomous, articulations 



subcylindric 1. Corallina. 



dichotomous, articulations 



cylindrical 2. Jania. 

 branched, articulations kid- 

 ney-shaped 3. Halimeda. 



II. NuLLiPORiD^ — Amorphous solid calcareous vegeta- 

 tions. 

 Form variable ; structure homoffeneous 4. Nullipoiia. 



" Order is Nature's beauty, and the way 

 To Order is by rules which Art hatli formed." 



From the " Doctor," ii. p. 295. 



