112 
CRYPTOGAMIA. ALGiE. Ulva. 
Fronds numerous, beset with innumerable short scattered branches, of an 
awl-shaped form. Colour a fine green : under the microscope beautifully 
reticulated, or besprinkled with numerous dots, probably seeds. 
Green Sharp-branched Laver. Found by Miss Hutchins in Bantry 
Bay, Ireland. E. Bot. E.) 
U. cornu'ta. Rather stiff, horned, growing on the ground. 
Dill 10.13. 
Three or four inches long, irregularly divided into horn-shaped branches; 
surface various, furrowed and scored, otherwise smooth, flatted, pale 
green. Dill. 52. Is it not a variety of Jungermannia pinguis ? Huds. 652. 
I am inclined to think that Dillenius was right in considering it a Tre- 
mella. 
(Horned Ground Laver. E.) On the ground in Enfield Chase, near 
Southgate. Dill. On the ground in a moist sandy soil near Leith. Mr. 
Yalden in FI. Scot. March, April. 
U. incrassa'ta. Flat, indented-toothed, green, the edge thicker. 
Huds. 572. (Clothed with tufted, jointed filaments. 
E. Bot. 967. E.)— Dill. 10. U—Vaill. 10. 3. 
Gelatinous, slippery, green ; grows in the water and on the edges of small 
ditches. Crowded, irregularly divided, swollen but not round, the seg¬ 
ments being flattish. Dill. 51. 
(Thick Laver. Chaetophora endivicefolia. Agard. Hook. E.) In the 
ditches of a field near Chichester, Sussex, without the East gate. Dill. 
Selsey Island, Sussex, between Greenwich and Woolwich, near Doncas¬ 
ter, about Spalding and elsewhere in Lincolnshire. Huds. On the stalks 
of Horsetail in a ditch on Sheep’s Green. Relh. n. 1087. (On the coast 
near Whitburn, Durham. Mr. Weighed. Winch. E.) A. March—Oct. 
U. dicpiot'oma. Flat, forked, green. 
(Hook. FI. Bond — E. Bot. 774. E .)—Lightf. 34, at p. 975. 
Leaf about three inches long, flat, greatly dilating upwards and forked 
into branches. Branches an eighth or a tenth of an inch broad; cloven 
at the ends. Colour pale green, substance membranaceous, very thin, 
pellucid, in the microscope reticulated. Seeds small, brown, scattered 
through the substance of the leaf. Lightf. 
(Green Dichotomous Laver. Zonaria dichotoma. Hook. E.) Rocks 
and stones on the sea shore at low water. Isle of Walney, Devonshire. 
Cornwall and Sussex. Basons of water among the sea rocks, about 
Leith and New Haven. P. Jan.—Dec. 
Var. 2. Brown ; segments narrower. 
This sort also is common in Cornwall. It grows in very large masses. 
The segments are long and numerous, but not half so broad as those of 
the preceding. Mr. Stackhouse. 
U. defrac'ta. Thread-shaped, unbranched, diaphanous, viscid. 
Plate XVIII.—(E. Bot. 1626. E.) 
Is found in masses, the stems simple, but variously coiled up, being very 
elastic as well as glutinous ; from eight to twelve inches long, cylindrical, 
nearly the eighth of an inch in diameter, terminating obtusely. It con¬ 
sists of a diaphanous membrane replete with a clear gelatinous substance. 
