1 1 m 



1 saw this specimen at the British Museum and I think it very likely, that it is only a 

 form of ./. tubcrculosa as Yendo supposed in his paper on the Corallinae of Port Renfrew. 



4. Arthrocardia aberrans \ en> 



iphiroa aberrans Yendo. 



5. Arthrocardia declinata (Yendo). 



Amphiroa declinata Yendo. 



6. Arthrocardia variabilis (Harvey). 



Amphiroa variabilis Harvey. 



7. Arthrocardia Darwini (Harvey). 



Amphiroa Darwini Harvey. 



S. Arthrocardia vertebralis Dec. 



'Amphiroa vertebralis Aresch. 



9. ; Arthrocardia breviarticulata (Aresch.). 



Amphiroa breviarticulata Aresch. 



I have in the herbarium of Suringar a specimen called Amphiroa breviarticulata 

 Areschoug which seems to be an authentic specimen. This plant is however an Arthrocardia. 

 I have tried in vain to see the type of A. breviarticulata and have therefore querried the species. 



I have not seen a specimen of Amphiroa crassissima Yendo but I feel almost sure that 

 this alga belongs to the genus Arthrocardia. 



All these plants are distinguished from Amphiroa by their nodes, which consist of one 

 row of pericline cells which, when fully developed, have a length from 200 to 350 u. and even 

 more. while the cells in the joints have as a rule a length of 60 a. 



Yendo has given very good figures of the nodes ancl some layers of the joint of 

 Arthrocardia aberrans and Amphiroa rigida but he has failed to grasp the importance of 

 what he was illustrating-. 



&■ 



Cheilosporum (Dec.) Aresch. 



In the collection of the Siboga was one species of Cheilosporum to which was added 

 a specimen not vet known from the Indian Sea, and collected by Teysman, the well-known 

 Indian botanist. 



1. Cheilosporum spectabile 1 larv. 



Harvey. Friendly Islands Algae N°. 31. 

 Grunow. Alg. d. Fidschi u. Samoa Ins. p. 41. 



Stat. jS. Lumu-Lumu-shoal, Bank of Borneo. 



Stat. <Si. Island Sebangkatan. 



Stat. 129. Karkaralong Islands. 



Stat. [33. Lirung, Karakelang Islands. 



Plants with slender or robust fronds, branching dichotomously, forming thick tufts in the 

 littoral region, but straggling and creeeping in deeper waters of 34 — 36 m. 



