119 
Pili hyalini terminales occurrunt. Sporangia monospora (et tetraspora?) in filis 
primi et secundi ordinis lateralia vel terminalia, plerumque sparsa, unilateraliter 
seriata, rarius opposita, nonnunquam in ramulis unicellularibus bina vel solitaria, 
etiam in filis repentibus sessilia, ovata, long. 10—12,5 y, lat. 5,5—6,5 y. 
The above diagnosis is essentially made after specimens growing on Chondrus 
crispus found at Hanstholm, on which | 
it formed a fine felted covering. One 
erect filament is usually given off 
from each cell in the creeping fila- 
ments, except the outermost ones. 
In the most developed erect fila- 
ments the cells are cylindrical, usu- 
ally 3—4 diameters long (up to 17 
long), while in shorter filaments and 
in the fructiferous parts of the longer 
the cells are shorter and often some- 
what swollen. The shape of the chro- 
matophore was not easily discernible, 
as I had only dried material at my 
disposal; in some cases, however, a 
chromatophore was visible, consist- 
Fig. 46. 
Chantransia leptonema (Hanstholm). A—C, E, G, erect filaments 
ing of a cylindrical parietal plate with sporangia. D, F, H, creeping filaments with erect fila- 
: PR: ments. 300:1. 
and an axile part containinga central 
pyrenoid lying in the upper part of the cell (fig. 47 A). Most of the erect filaments 
attain only a small size and remain unbranched, but some grow longer and may 
then bear one or some few vege- 
tative branches. Terminal hairs fre- 
quently occur and may give rise to 
e sympodial branching. The sporan- 
gia are in great measure lateral on 
the erect filaments and then as a 
rule seriate, a position which often 
causes a recurvation of the filament 
Fig. 47. (fig. 46 A,G). The sporangia are more 
Ce eat eh eet en €. Meenas ately opposite, but they are frequent. 
ments seen from below and two erect filaments, e. 620: 1. ly terminal, in the long filaments as 
well as in the very short (figs. 46, 47): 
in the specimens from Hanstholm sporangia sitting directly on the creeping fila- 
ments were not observed. Sporangia borne on unicellular branchlets also occur, 
one sporangium being terminal, the other lateral (fig. 46 6, C). The long filaments 
are only sporangia-bearing in their upper part. The sporangia are only a little 
varying in shape and size, nearly twice as long as broad. They appear to be 
