MAETNE ALGiE OF THE * SEALAEK ' EXPEDITIOIS". Ill 



IV. Systematic Account. 



Fam. HELMINTHOCLADIACEiE. 



* 



Chantransia (DC), Schmitz. 



1. Cha:ntransia Liagoe^, n. sp. 



Thallo endophytico et epiphytico, nano, csespitibus globosis sparsis Liagorae insidente, 

 constante e fills hospitem intrantibus et fills erectis. Pills ercctis parce ramosis, 

 ramis post monosporangia terminalia delapsa egredientibus ; pills non visis, 

 verisimlllter raris. Monosporanglls aut termlnallbus aut laterallbus, pediccllo 

 ramoso suffultis, ramis denuo monosporangia ferentibus. Pills latis 6-8-12 m, 

 articulls 16-20 ft longis. Monosporanglls non maturis ; antheridiis et carpogoniis 



non visis. 



Coetivy, reef, on Liagora hawaiiana ; in alcoliol. 



This little Chantransia forms a small tuft, wbich penetrates between the horizontal 

 filaments of the Liagora and attaches itself at their base. I could detect no creeping 

 filaments in the host plant giving rise to new tufts. It has a height of 1 mm., the 



are sparingly and irregularly branched and bear monospores both at the apex and 



laterally. After the monospore has fallen off, or perhaps while still in situ, the filament 

 or branch that carries it grows out sideways. I also noted clusters of carpospores j 

 these are not arranged in series as in 0. efflorescens. The filaments have a breadth of 



6-8, rarely of 12 ix, and their cells a length of up to 20 fi. On account of the al 

 having been first preserved in formalin and afterwards in alcohol, it is difficult to judge 



the shape of the chromatophore. 



I believe that this alga is a new species ; there are, so far as I know, only two other 

 species of Chantransia on Liagora, namely, Ch. Barhadensis and Ch. Nemalionis, which 

 were found on Uagora elongata by Miss Vickers. Our alga differs from both species 

 in the smaller size of its cells and filaments. 



LiAGOHA, Lamouroux 



1. Liagora orientalis, J. Ag. 



IGORA ORIENTALIS, J. ilg. 



J. Agardh, Analecta algolcgica, 1896, p. 99. 



Coetivy, reef ; in alcohol. 

 Distribution. Indian Ocean, Ceylon. 



2. Liagora hawaiiana. Butt 



and Galaxaura" Minnesota 



Coetivy, reef; in alcohol. 



Distribution. Laie Point, Koolauloa, Oahu, Pacific Ocean. 



Liagora hawaiiana belongs to the group of Liagorce with diehotomously branched 

 fronds. It differs from all known species of this group in having an articulate frond ; 

 at the top of the thallus the articulations are inconspicuous, but lower down they are 



