120 



During the examination of my Bryopsis-materia} I found this 

 nice, small Caiilerpa growing entangled in a large Bryopsis-tuit. The 

 specimens met with quite agree with those found earlier in the West 

 Indies by the late M"^ Vickers at Barbadoes and so well pictured 

 in her »Phycologia«. M'^® Vickers has referred our plant to C. am- 

 bigua Okam. and I agree with her, that this is most probably 

 right but only in part. Whilst, namely, our plant seems to agree 

 with, or in any case to come very near to, that form figured by 



Okamura, 1. c, on pi. 1, figs. 7, 8, 

 9, 10, it seems to be rather different 

 from that shown in figs. 3, 4, 5, 6. 

 To be sure Okamura considers 

 these two forms as belonging to the 

 same species, but I cannot help 

 having some doubt in this matter 

 and my West Indian material, in 

 any case, seems only to come near 

 to the first mentioned form. For 

 the rest referring to the more de- 

 tailed report I have given in my 

 earlier paper I shall here only give 

 a description of the West Indian 

 plant. 



As mentioned above, it was 

 found growing intermingled in 

 tufts of Bryopsis and it was there- 

 fore also rather difficult to get the 

 plant separated out; most often at 

 the base of the erect axes only 

 some few rhizoids were present 

 quite in accordance with what 

 Okamura has found in his plant. 

 But afterwards I also found plants with a part of the rhizomes, 

 shorter or longer, most often very irregularly bent, squeezed into 

 the Bryopsis-iVili and in one specimen a rather well-developed 

 creeping rhizome was present (Fig. 94) with irregularly branched 

 rhizoids growing downward and the axes upward. I may point 

 out, however, that like Caulerpa jastigiata the difference between 

 rhizome and axes seems to be rather slight and the rhizome some- 

 times bears ramuli. 



From this to be sure often rather indistinct rhizome the erect 

 axes grow up. They are provided with shorter or longer, disti- 



Fig. 94. Caulerpa Vickersii Bergs 

 Habit of plant. (About 6:1). 



