alluded to another new genus sent to me by Mr. Clifton ; and 

 though the specimens yet received are so far imperfect that they are 

 not in fruit, I do not wish to delay the publication of so beautiful 

 and remarkable a type of structure ; and the more especially be- 

 cause it is, I trust, destined to bear the name of its energetic and 

 obliging discoverer, to whose zeal and liberality I am indebted 

 for several of the most curious Algae already figured in this 

 work, and for others which will appear in future numbers. 



CUftonia, as now proposed, will include, besides our C. pedi- 

 nata, the old "■ Amansia semipinnata' of Lamouroux, which may 

 be called Cliftoiiia Lamourouocii. It differs from our present 

 plant in the proportions between the breadth of the lamina bor- 

 dering the outer edge of the costa, and the pectinations which 

 issue from the opposite edge. It is of extreme rarity : and as 

 yet I have only seen a fragment, sent by Lamouroux to the late 

 Mr. Dawson Turner, and now preserved in the ' Hookerian Her- 

 barium.' This fragment well agrees with the figure given by La- 

 mouroux, through which it is chiefly known to botanists. 



Cliftonia may be regarded as holding a middle station be- 

 tween Amansia and Claudea ; agreeing with the former in 

 the cellular structure, and with the latter in the evolution of 

 the frond. The fructification, it may be anticipated, will pro- 

 bably afford some strengthening characters further to mark the 

 genus. If one may hazard a conjecture, I should guess that the 

 ceramidia, as in Claudea, will be formed from contracted phyl- 

 lodia ; and the tetraspores lodged in a single row, in the ramelli. 

 I trust Mr. Clifton's future explorations of Garden Island may 

 satisfactorily solve this problem. 



Fig. 1. Cliftonia pectinata, — the natural size. 2. Fragment of a pliyllo- 

 (lium, with a young one starting from its midrib. 3. Some of the cellular 

 tissue from the lamina. 4. Frustule of one of the pectinate ramelli: — 

 the latter figures variously magnified. 



