Some Chlorophyceae 

 from the Danish West Indies. 



By 



F. Børgesen. 



C au 1 e r pa. 



During the examination of my algal material collected in the 

 lagoons of the Danish West Indies I have found the following two 

 species of Caulerpa which are not mentioned in my treatise con- 

 cerning this genus. 1 ) 



Caulerpa fastigiata Montagne 



in Ramon de la Sagra, Flora Cubana, pi. 2, fig. 3; Weber van Bosse, 

 Monographie des Gaulerpes (Ann. du Jard. bot. de Buitenzorg, Vol. 15, p. 262). 

 Vickers, Phycologia Barbadensis, tab. 36. 



When preparing my paper on the West Indian Caulerpas I 

 looked vainly for this species, which judging from its distribu- 

 tion in the West Indies ought to occur at the Danish Islands also. 

 Having now examined all my material collected in the lagoons, I 

 have found the species richly represented in a collection from the 

 small lagoon at Cruz Bay, St. Jan. It occurred here growing on 

 muddy bottom in quite shallow water. It was found as Ægagro- 

 pYot-like clumps formed by the entangled rhizomes and axes grow- 

 ing out from them. 



The form I have found (fig. 1) had commonly a rather well- 

 developed rhizome, from which partly rhizoids, partly assimilation- 

 axes grew out and these had sometimes many and closely placed, 

 sometimes few and scattered ramuli; these are sometimes opposite 



1 ) Børgesen, F., An ecological and systematic account of the Caulerpas of 

 the Danish West Indies (K. Danske Vidensk. Selsk. Skrifter. 7. Række, 

 naturh.-matbem. Afd., IV. 5. København 1907). 



