] 30 NEMATOPHYCEJE. 



Pzasiola calophylla. (Spreng.) 31enegh. Cenni. p. 36. 



Ca?spitose, dark green, crispate ; thallus 2-4 lines long, 

 narrow, linear, rather circinate, attenuated at the base into a 

 stem, truncate at the apex, now and then crenate; cells large, 

 arranged in longitudinal series. 



SIZE. Cells -004--005 x -002--004 mm. 



Jessen, Mon. Pras. t. 1, f. 1-3. Lagerstedt. Pras. p. 40. 



Ulva calophylla, Hass. Alg. 298, t. 77, f. 1. Eng. Fl. v., 

 312. Grev. Alg. Britt. p. 176. Eng. Bot. ed. ii., p. 112. 

 Harv. Man. 171. Johnst. Fl. Berw. ii., 251. Mack. Hib. 243. 



Bangia calophylla, Carai. in Grev. S. Crypt. Fl. t. 220. 



On damp stones, rocks, &c. 



" Forms a bright green thin stratum. Frond minute, three or four 

 lines long, linear strap-shaped, obtnse, tapering at the base, or suddenly 

 contracted into a cylindrical stipes, much waved and curled, very 

 variable in breadth. Granules quaternate, closely covering the frond ; 

 set in longitudinal rows, of which two or more (sometimes half a dozen) 

 form the breadth of the frond ; interstices colourless." Harvey. 



Plate L. Jig. 3. Plant magnified slightly. Fig. 4, lower portion of frond 

 X400. 



Sub-Family 2. ULVEJI. 



Thallus membranaceous, vesiculose, or tubulose. 



GENUS 55. ENTEROMORPHA. Link. (1820.) 



Thallus membranaceous, tubular or utricle-shaped, fixed at 

 the base (usually at the first, but afterwards often free 

 swimming) ; composed of one stratum of cells, sometimes 

 branched, but rarely much branched. 



Propagation by zoogonidia, produced by repeated division of 

 the cytioplasm, rostrate at one extremity, and furnished with 

 two cilia. 



Enteromoirpha intestinalis. (Linn.) Link. Hor. Ber. (1820.) 



Fronds simple, elongated, variable in form and size, usually 

 becoming more or less inflated, obtuse above, attenuated at the 

 base, pale green ; cells 3-5-6 angled. 



SIZE. Cells -012--02 mm. diam. 



Eng. Fl. v., p. 314. Jenner, Tunb. Wells 190. Eng. Bot., 

 ed. ii., t. 2408. Hass. Alg. 303, t. 77, f. 2. Grev. Alg. Britt. 

 179. Harv. Man. 173. Mack. Fl. Hib. 242. Wyatt. Alg. 

 Exs., No. 80. Eabh. Alg. Ear. iii., 312. 



Ulvamarina tululosa intestinorwnfiguram. Ray. Syn., 62. 



Tremclla marina tubulosa, etc. Dillen. Muse., t. 9, f. 7. 



Ulva intestinalis . Huds. Angl. 568. Light. Fl. Scot. 

 963. Relh. Cant. 443. Purt. Midi. Fl. ii., 617. Hook. Fl. 



