Algae of New Zealand — LlNDAUER 
351 
ita, filimentosa, monosiphonia, ecorticata, ad 10 
cm. alta, oriente e rhizoidibus basalibus; axe pri- 
maries percurrente, flexuoso, in vicem sparse 
ramoso, ramis inferis longioribus, patentibus, 
laxis, ramulis alternis singulos ad articula singula 
ornatis, brevibus, fastigiatis, alterno-dichotomis; 
ramulis ultimis saepe secundis; articulis axis 
primarii 2 mm. longis, 0.3 mm. latis, ramulorum 
6-cies longioribus quam latioribus, cacumini- 
bus obtusis; cystocarpiis non observatis; spor- 
angiis (?) obovoidis, breviter pedicillatis intra 
furculas ramulorum. 
Frond very delicate, rose-red, distichous, de- 
compound, filamentous, monosiphonous, ecorti- 
cate, up to 10 cm. high, arising from basal 
rhizoids; main axis percurrent, flexuous, sparsely 
alternately branched, branches longest below, 
patent, lax, clothed with alternate branchlets, 
one to each articulation, short, fastigiate, alter- 
nate-dichotomous, the ultimate ramuli often 
secund; articulations of main axis 2 mm. long, 
0.3 mm. wide, of the ramuli 6 times as long as 
wide, tips obtuse; cystocarps not seen; sporangia 
(?) obovoid, shortly pedicillate within the forks 
of the ramuli. 
The genus to which this plant belongs is 
questionable and may require revision when 
sexual plants are discovered. The form of the 
sporangium (?) is most unusual. It is first 
recognizable as such as the swollen and enlarged 
terminal cell of a lateral or axial 2 -celled branch, 
the lower cell acting as a pedicel. At this stage 
it resembles a monosporangium. As it enlarges, 
the content is divided at the lower third, the 
upper larger part appearing to have been cut 
off from the lower part and resting in it. It now 
appears as an unequal bisporangium. Matura- 
tion progresses most rapidly at the distal end and 
soon the content is divided at the upper third. 
The sporangium (?) is now vaguely seirospore- 
like, but no further development has been 
observed. 
In general vegetative habit the plant re- 
sembles C licomophorum Harv., of Victoria, 
Australia, and is, perhaps, nearest to it, although 
Fig. 8. Species of Callithamnion and Dasya. a-d, 
Callithamnion levringii sp. nov.: a, pinna (X 0.6); 
b, tip bearing polysporangium (X 65 ) ; c, young 
poly sporangium (X 65 ) ; d, polysporangium almost 
mature (X 120). e-g, Dasya subtilis sp. nov.: e, 
portion of frond (X 120); f, cystocarp (X 120); 
g, tetra sporangial stichidia (X 120). 
the New Zealand specimens lack rhizoids coat- 
ing the main divisions and the reproductive 
bodies are dissimilar. 
Distribution: So far found only in the drift 
at Pihama, Taranaki, the type locality. Summer. 
Type specimen No. 7165, Herbarium Lin- 
dauer; iso-types distributed in Lindauer ( 1948), 
Algae Nova-Zelandicae Exsiccatae, Fasc. XIII, 
No. 325. 
Dasya subtilis sp. nov. 
Fig. 8 e-g. 
Frondibus parvis, rubescentibus, cristatis, ten- 
eris, flaccis, filiformis, 2-4 cm. aids, decomposi- 
tis, in vicem subdistichose ramosis; ramis pri- 
mariis corticatis, pericentricis cellulis 5; ramulis 
ultimis monosiphonis, dichotomis, divaricatis; 
articulis 3-4-cies longioribus quam latioribus, 
cacuminibus obtusis; ramulis terminalibus saepe 
aggregatis et involutis; cystocarpiis magnis, sessi- 
