40 IIENRIK PRINTZ [1920 



Fig. 233— 243. Ilonuidium [Uiccidum Buatn f. celluUs passim 

 lumiiUs. 



PI. VII. 



Fig. 244— 252. Trentepohlia aurea (L.) Maht. f'oniut. 



Fig. 244, 245, 246, 250, and 252 show filamenls willi 

 gametaiigies, tine first menlioned onc with a partly 

 einpticd gameitangium. Fig. 247, 249, and 251, vege- 

 tative filaments showing ramificalion and apioal 

 cells. 



PI. VIII. 



Fig, 253—263. Trenlepohlia aurea (L.) Mart. formå. 



The figures show the ramification ot' the filajTients, 

 apical cells, ajid shape and arrangement of the 

 gametangies. In fig. 260, an einptied gametangium, 

 the point of which is drawn out into an abnormally 

 long beak. 



PI. IX. 



Fig. 264—273. Trentepohlia umhrina (Kutz.) Born. 



Fig. 264 — 272, oells of various age, partly fomiing 

 akmetes. Fig. 273, gametaiigies. 



PI. X. 



Fig. 274— 289. Trentepohlia umbrina (Kutz.) Born. 



Fig. 274, 279, and 285, emptied gametangies. Fig. 

 282, gametangium. For the rest. vegetative ceills in 

 akinet e - format ion . 



PI. XI. 



Fig. 290— 1'! 14. Phijcopeltis arundinacea (Mont.) De Tom. 



Fig. 290, a very young thailus, consisting of seven 

 cells. Fig. 291—292, young thalli, the last one wiUi 

 a disc-sporaiigium. Fig. 293 shows the edge of two 

 discs having oome m cantact with each other. Fig. 294 

 shows the regular structure of an older tliaLlus; the 

 cell-rows are negularly dichotomously ramified. With 

 disc-sporangies. 



PI. XII. 



Fig. 295— 305. Phycopeltis flabelligera (De Toni) Hansg. 



Fig. 295, 297, 299,' 300, and 302 ane isolated filaments. 

 The rest of the figures are parts of larger thalli, 

 showing their irregular construction with isolated 

 filaments and irregular circumiferences. 



