130 NEMATOPHYCEE. 
Prasiola calophylla. (Spreng.) Menegh. Cenni. p. 36. 
Cespitose, 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. 
Sizz. 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. FI. v., 
312. Grey. Alg. Britt. p. 176. Eng. Bot. ed. ii, p. 112. 
Harv. Man. 171. Jobnst. Fl. Berw. ii., 251. Mack. Hib. 248. 
Bangia calophylia, Carm. in Grev. §. 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, obtuse, 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. fig.3, Plant magnified slightly. Fig. 4, lower portion of frond 
x 400. 
Sub-Family 2. Utves. 
Thallus membranaceous, vesiculose, or tubulose. 
Gents 55. ENTEROMORPGHA. 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. 
Enteromorpha 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. 
Srzz. Cells 012-02 mm. diam. 
Eng. Fl.v., p. 814. 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. Rabh. Alg. Eur. iii., 312. 
Ulva marina tubulosa intestinorum figuram. Ray. Syn., 62. 
Tremella marina tubulosa, etc. Dillen. Musc., t. 9, f. 7. 
Ulva intestinalis. Huds. Angl. 568. Light. Fl. Scot. 
968, Relh. Cant. 443. Purt. Mid]. Fl. ii., 617, Hook. Fl, 
