119 



Pili hyalini terminales occurrunt. Sporangia monospora (et tetraspora?) in filis 

 primi et secundi ordinis lateralia vel terminalia, plerumque sparsa, unilateraliter 

 seriata, larius opposita, nonnunquam in ramulis unicelluiaribus bina vel solitaria, 

 etiam in filis repentibus sessilia, ovata, long. 10 — 12,5//, lat. 5,5 — 6,5^/. 



The above diagnosis is essentially made alter specimens growing on Chondras 

 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 r/ 

 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- 

 matophorewas not easily discernible, 

 as I had only dried material at my 

 disposal; in some cases, however, a 



Chromatophore was visible, consist- chantransia leptonema (UarlxLm). A-C, E, G, erect filaments 

 ing of a cylindrical parietal plate with sporangia. D, F, H, creeping filaments witli erect tila- 

 , ., . . , nients. 300:1. 



and an axile part contaming a central 



pyrenoid lying in the upper part of the cell (tig. 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 

 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. 46 A, G). The sporangia are more 

 rarely opposite, but they are frequent- 

 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 B, 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 



Fig. 47. 



Chaiilraiisia leptonema (Hanstholm). A and B, fragments of 

 creeping filaments with short erect filaments. C, creeping fila- 

 ments seen from below and two erect filaments, e. (520:1. 



