125 



south-west corner of the lagoon. It grows here together with the 

 forma typica but is recognizable by its much lighter green colour. 



Geogr. Distrib. The West Indies, Brazil, The Friendly Islands, 

 Siam, East India, Ceylon etc. 



4. Caiilerpa Webbiana Montague. 



MoNTAGNE, C, De Torganisation et du mode de reproduction des Cau- 

 lerpes, et en particuher du Caulerpa Webbiana, espece nouvelle des iles Cana- 

 ries (Ann. des sciences naturelles, 2. ser., t. 9, botanique, Paris 1838). Weber- 

 van BossE, A., Monographie, p. 269. Borgesen, F., 1. c. 1907, p. 357. 



f. disticha Weber-van Bosse, 1. c. p. 270. (Fig. 99). 



This nice little plant was found twice in the sea around the 

 island St. Jan, one time at a depth of about 30 meters, another 



O^bK^^^ 



Fig. 99. Caulerpa Webbiana Mont., f. disticha Weber-van Bosse. 

 From deep water (50 m.) off Ramshead, St. Jan. (About 7:1). 



time in more than 50 meters. It grows together with other algse 

 e. g. Anadyomene stellata and creeps on the bottom fixed to gravel 

 and pieces of coral. The rhizome on its under side bears numerous 

 rhizoids which are sometimes finely ramified, sometimes ending 

 in small discs by help of which the plant is fixed to the gravel. 

 The erect shoots have two rows of opposite ramuli. These 

 are flat, their edges turned towards the somewhat compressed 

 shoot. They are wedge- or fan-like in shape with the broadest end 

 turned outward and are several times dichotomously divided. 

 The last emarginated ramifications end with small spines. In the 

 herbarium of M"^^ Webee-van Bosse a smah specimen of this 

 form is to be found; it was collected by the late M"'' Vickers in 

 the Canary Islands and agrees very well with my West Indian 



