me 
middle, narrowed gradually to the tip and the base. Veins 
quite invisible. Sori round, immersed, distant, uniseriate, 
confined to the upper third or half of the frond, which is 
repand, the sori being placed in the projections of the waves 
and causing prominent papillae on the face. 
Polypodium (Phymatodes)holophyllum, Baker, 
n. sp. Rhizome wide-creeping, not more than half a line in 
diameter, clothed with dense ereeto-patent minute linear- 
subulate paleae. Stipes subdistant, brown, polished, very 
slender, naked, one to two inches long. Lamina entire, 
roundish or ovate, one-third to half an inch long and broad, 
crenulate round the edge except towards the base, glabrous, 
rigid in texture, without any distinet midrib, the veins fla- 
bellate from the apex of the stipe, forming copious irregular 
areolae without any free included veinlets. Sori few, round 
superficial, scattered irregularly. — Like P. oodes in its 
rhizome, stipe and sori; differing by its smaller frond, ere- 
nulate border and flabellate veining. : 
Wittrock et Nordstedt, Algae aquae duleis exsie- 
catae etc. Fasc. V et VI. (Upsaliae 1879.) = 
Diese beiden neuen Faseikel der werthvollen Sammlung 
enthalten wieder eine ausserordentliche Fülle seltener und 
interessanter Formen. Es sind vertreten: Schweden, Nor- 
wegen, Dänemark, Oesterreich, Sibirien, das rothe Meer, 
Nordamerika und die Sandwichsinseln. Aus dem reichen 
Inhalt heben wir zunächst die neuen Arten und Formen 
mit ihren Diagnosen hervor. en 
204. Oedogonium Landsboroughii (Hass.) Wittr. 
ß norvegicum Wittr. nov. var. Var. oogonis singuli 
vel binis Ges ternis); oogoniis et oosporis brevioribus, cel 
lulis spermogoniorum crassioribus, cellulis vegetativis cras- 
sioribus et brevioribus quam in forma «; plantis m 
eadem fere crassitudine ac femineis; _ un ee 
erass, cell. veget. 38-45 u, altit. 11 —3'/; plo majore; 
204000. GA. 4: 
» 00spor. RE re ER 
„  eell. spermog. 37—45 „ » 8-45. , 
207. Oedogonium Wolleanum Wittr. $ insigne 
Nordst. nov. var. A forma americana differt magnitudine 
paullo majore, oogonüs 3-5 (rarissime 10) continuis, costis 
membranae oogoniorum paullo densioribus et paullo minus 
eminentibus, spermogonio uni-quadricellulari; erass. cell. veg. 
 trivial. 18—36 u, altit. 3—7 plo majore; cr. cell, suff, 
