IG 4 



I, p. 124; Collins Green Alg. N. Am. p. 206; Borgesen Mar. 

 Alg. Faeroes, p. 489 Uli'a Linza L. ; Lyngbye Hydr. D.in. p. 

 32 ; Harv. Phyc. Brit. t. XXXIX. Phycoscris crispata Kuetz. Sp. 

 p. 4/6; Id. Tab. Phyc. VI, t. 17, II. Ulva Enlcromorpha far. 

 lanceolata Le Jolis List. Alg. Cherb. p. 42. Phycoseris lanccolata 

 Kuetz. Sp. p. 475; Id. Tav. Phyc. VI, t. 17, I, and many other 

 forms. 



Fronds gregarious, elongated, flat, thin-membranaceous, linear, 

 linear-lanceolate or oblanceolate ; entirely simple or so for the 

 most part excepting the lower portion of frond where a few 

 branches are often proliferated. They taper strongly below, un- 

 dulated or flat at margin, more or less wrinkled on the surface, 

 often twisted or longitudinally folded, 10-50 cm. long, 0.5-15 cm. 

 broad. When young, the frond is filiform and tubular ; but in such 

 a young and slender one as measuring 1-1.3 mrn - ' n diameter 

 throught, the inner cavity is here and there interrupted by the 

 union of the membrane. In more broad frond the membrane is 

 for the most part united except marginal portions where the in 

 terior of frond is left as a hollow space and also a few cavities 

 are here and there left in the median part. In fully grown frond, 

 hollow space is not found but in the stipe and marginal portions, 

 the membrane of remaining portion being united after the manner 

 lof Ulva. 



Cells of the stipe are clavate, vertically inserted and sub-seriated 

 ongitu^ inally ; those standing a little above are elongated poly 

 gonal and arranged in a longitudinal direction. In the upper 

 broader portion, cells become smaller and irregularly disposed. 

 The inner wall of membrane is somewhat thicker than the outer 

 wall at marginal tubular portion. Cells in a cross section of frond 



