;{8S 



52 



likeness with var. conjnephora as Sonder') lias already mentioned. What is most 

 characteristic of this variety is that the ramuli are distichous and opposite but 

 sometimes one can find an erect shoot with multiseriated ramuli. An otherwise 

 normally developed specimen from Celebes in the herbarium of Mme. Weber van 

 Bosse has just a single assimilator with multiseriated ramuli (cfr. Mme. Weber 

 van Bosse's Monograph, tab. XXXIII, lig. 14) and the likeness with var. lœtevirens 

 is thus very great. That var. lœtevirens also shows a great resemblance to the 

 above-mentioned var. occidentalis I have already shown. 



To the var. Lamourouxii I have referred 

 some few specimens growing in deeper water. 

 They are characterized by having the ramuli 

 distichous; sometimes also many-sided occur 

 (see Fig. 31). The ramuli are distichous not 

 oppositely placed, somewhat upward bent and 

 the uppermost swollen part is broadly convex. 

 My specimens agree well with the figures given 

 by Turner (32, tab. 229) and Kützing (20, Bd. 7, 

 tab. 14). Just as these figures show, the ramuli 

 are somewhat flattened on the upward turned 

 side; for my specimens, living as they did in 

 deeper water, this can perhaps have some im- 

 portance, the ramuli turning by this fact a pro- 

 portionally broad surface towards the light. 



The forma remota of Svedelius (I.e. p. 121) 



found in "deeper water", seems to me on account 



of the more roundish ramuli and the shorter 



erect shoots an intermediate form between var. 



Lamourouxii and var. clavifera. My specimens 



and the same is the case with those of Svedelius 



have all roundish erect shoots in accordance 



with the Fucus Lamourouxii of Turner ; but as 



Fig. 31. Canlerpa racemosa {Fovsk.) Wehev SvEDELlUS remarks p. 121 "Owing to the OCCUr- 



van Bosse var. Lamourouxii (Turner) rence of transitional forms to such fomiS as 



Weber van Bosse. From deeper water off l^ayg flat axis, WebER VAN BOSSE has brought 



Hermitage (St. Jan). (About 1 : 1.) together all these forms under var. Lamourouxii 



which thereby has received a very extended sense". How far it is right to refer 



such forms with flattened axis to the var. Lamourouxii I shall not discuss nearer here, 



experimental cultivation must decide the matter. I shall only on this occasion 



refer to an observation by Harvey, Nereis bor. Am. p. 19, where in mentioning 



Fucus Lamourouxii Turner he writes: "I cannot consent to separate specifically the 



forms figured by Turner, and above indicated as varieties. I fear also that C. oligo- 



') SoNDiiii, W., Die Algen des tropischen Australiens, p. liö. Hamburg 1871. 



