187 



Chrysymenia pyriformis nov. spec. 



Frondes a callo radical! pliirinige exsLirgunt, 2—4 cm. et ultra 

 longae. Caules filiformes ramosi, circiter 1 — l^'s mm. crassi, in- 

 ferne subnudi, superne obsiti ramulis vesicseforraibus, pyriformibus, 

 5 mm. latis, 8 mm. longis. Color algae vivge purpm'eus ad fuscum 

 vertens. Substantia mollis et lubricosus, Cystocarpia, antheridia 

 et tetrasporangia ignota. Duobus diversis stratis frons cava contexta 

 est; cellulae exteriores minores, rotundatae, interiores majores, poly- 

 gonatae, glandulas pyriformes acervatim gerentes. Caules solidi, 

 textura parenchymatica. 



The plant (Fig. 8) reaches a height of about 4^2 cm. (the 

 largest specimen collected, the smaller ones were only two cm.). 

 It is fastened to the substratum (stones, shells etc.) by means of 

 a rather large, flat disc; from this one or more, 

 erect ramified shoots grow up. The stem of 

 these erect shoots is terete and solid; it bears 

 the swollen, hollow, short shoots. The shape 

 of these is obovate-pyriform reaching a length 

 of about 8 mm. and a breadth of 5 mm.; the 

 wall is about 90 ^ thick while the hollow in 

 the interior is filled up with slime. 



The plant is when living somewhat trans- 

 lucent. With the exception of the stem, which 

 is firmer, it is of a rather soft and slimy con- 

 sistency and adheres strongly to the paper. 

 The colour is red with a yellows-brown tinge. 



As to the anatomy of the thallus, we 

 find the membrane of the vesicles consisting 

 of a layer of large cells (Fig. 9 A), which on 

 their outer side are covered more or less com- 

 pletely by a layer of small cells (Fig. 9 B). Seen 

 from the surface the innermost large cells show themselves to be 

 roundish polygonal (Fig. 9 J5, C). On the upper side over the 

 transverse walls of the large cells, where some more space is left 

 on account of the somewhat curved surface of these cells, we find 

 a row of roundish cells and from these again smaller and smaller 

 roundish and flat cells grow horizontally out over the surface of 

 the large membrane-cells (Fig. 9 B). In younger vesicles the bark- 

 cells leave a space free over the middle of the membrane-cells but 

 in older vesicles the bark-cells very often quite cover them. 



On the inner side of the large membrane cells we find here 



Fig. 8. Chrysymenia 

 2yyriformis nov. spec. 



A little magnified (about 

 1V4 : 1). 



