THALLOGENS. : 5) : ALGALS. 
CLASS I. THALLOGENs (V. K., p. 5.) 
Of this there are three Alliances; viz., 
ALGALS. Submersed ; having no mycelium. 
FUNGALS. Aerial; having a mycelium. 
LICHENALS. Aerial; having no mycelium. 
The natural orders of these alliances need not occupy the attention of the 
student. Few of the numerous species are of importance, either in medicine 
or common life. 
THE ALGAL ALLIANCE (V. K., p. 8.) 
A few species are employed as food. Any medicinal properties which 
they have been found to possess appear to be owing to the presence of 
iodine, which the marine species contain in common with other oceanic 
productions. 
Porpuyra. Agardh. 
Frond flat, very thin, more or less purple, leafy, not gelatinous. Spores 
roundish, arranged in fours (usually) and filling all the frond. 
1. P. laciniata Agardh.—(Laver. Stoke. SuoKauy.) Fig. 4. 
Fronds clustered, deeply cleft, with broad segments variously lobed and cut 
at the edges, bright purple. 
Habitat. On rocks and stones in the sea, Annual. 
Quality. Saline, nutritious. 
Uses. Employed as food, salted ; eaten with pepper, vinegar, and oil. Said to be useful 
m scrofulous affections and glandular tumours. 
2. P. vulgaris Agardh.—(Laven.) : 
Fronds undivided, broadly lanceolate, wavy, bright lively purple. 
Habitat, Quality, and Uses, as the last. 
Unva, Linneus. 
Frond ne, green, flat, sometimes inflated. Spores minute, lying 
in fours, r 
1. U. latissima Linn.—(Green Laver. GREEN SLoKE. OysTER GREEN.) 
Marine. Frond broad, oblong, roundish, wavy, full green, completely 
covered by fructification. 
_ Habitat. Rocks and stones in the sea. Annual. 
Quality. Bitterish, salt, mucilaginous, 
Uses, " Employed as food, stewed and seasoned with lemon-juice. Ordered for serofulous 
ee patients, 
oS Laminaria, Lamouroux. es 
Frond leathery, flat, without a midrib. Spores forming close spots, and — 
_, _ imbedded in the thickened surface of some part of the frond. we 
1. L, digitata Lamouroux.—(Tanere. Ska Ware. Sea-crrpues. Sea- 
_ WAND, ReEpD-waARE.) ees 
Stem woody, cylindrical, gradually expanding into a leathery roundish- 
oblong frond deeply cleft into many linear divisions. oe 
Dually Martin : 
Uses. “When young employed as food for both man and cattle. 
