WEBER-VAN BOSSE—MARINE ALG A 275 
LV. Systematic Account*. 
Fam. HELMINTHOCLADIACEA. 
CHANTRANSIA (DC.), Schmitz. 
1. CHANTRANSIA LIAGORA, 0. sp. 
Thallo endophytico et epiphytico, nano, czespitibus globosis sparsis Liagorze insidente, 
constante e filis hospitem intrantibus et filis erectis. Filis erectis parce ramosis, 
ramis post monosporangia terminalia delapsa egredientibus; pilis non visis, 
verisimiliter raris. Monosporangiis aut terminalibus aut lateralibus, pedicello 
ramoso suffultis, ramis denuo monosporangia ferentibus. Filis latis 6-8-12 u, 
articulis 16-20 » longis. Monosporangiis non maturis; antheridiis et carpogoniis 
non Visis. 
Coetivy, reef, on Liagora hawaiiana; in alcohol. 
This little Chantransia forms a small tuft, which penetrates between the horizontal 
filaments of the Ziagora 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 axes 
are sparingly and irregularly branched and bear monospores both at the apex and 
laterally. After the monospore has fallen off, or perhaps while still i situ, the filament 
or branch that carries it grows out sideways. I also noted clusters of carpospores ; 
these are not arranged in series as in C. efflorescens. The filaments have a breadth of 
6-8, rarely of 12 », and their cells a length of up to 20n. On account of the alge 
havin® 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. Barbadensis and Ch. Nemalionis, which 
were found on Liagora elongata by Miss Vickers. Our alga differs from both species 
in the smaller size of its cells and filaments. 
Liacora, Lamouroux. 
1. Liacora ortenTaAuis, J. Ag. 
J. Agardh, Analecta algolcgica, 1896, p. 99. 
Coetivy, reef; in alcohol. 
Distribution. Indian Ocean, Ceylon. 
2. LIAGORA HAWATIANA, Butt. 
Butters, “ Liagora and Galaxaura,” Minnesota Bot. Studies, vol. iv. part 2, 1911, p. 169. 
Coetivy, reef; in alcohol. 
Distribution. Laie Point, Koolauloa, Oahu, Pacific Ocean. 
Liagora hawaiiana belongs to the group of Liagore with dichotomously 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 
* [Unless otherwise stated the specimens are from surface reefs. J. S. G.] 
