326 
THE SEAWEEDS 
membrane (or cell-wall) of the articulations is very thin, and not so 
gelatinous as in most Griffith sias. Substance soft, adheres to paper. 
"West Australia (King George Sound), 
Griffithsia monilis Harvey. 
Frond caespitose, regularly dichotomous, fastigiate, segments erect 
articulate above, ramelli simple, short, incurved, eonsistantly bearing tetra- 
sporangia. Cystocarps lateral on the articulations. 
South Australia (Investigator Strait. Sturt Bay), West Australia, 
Tasmania. 
Griffithsia gunniana J. Agardh. 
Frond caespitose, erect, dichotomous: branches alternate, short, inter- 
mediate flexuose and overhanging, sublateral fasciculately branched ; 
branches patent, obtuse, acuminate, articulations sub-contracted at the 
Fig. 157 .^—Griffithsia Gunniana. 
nodes, oblong-cylindrical, length four times the diameter. Upper branches 
at length fruiting, pyriform, with a whorl of tetrasporangia surrounded by 
short, sterile, vertieillate ramuli. in an involucre of simple, abbreviated, 
incurved ramelli. 
South Australia (Eastern Bays), Tasmania. 
Griffithsia flabclliformis Harvey. 
Frond to 15 cm. long and 18 cm. wide, many times dichotomous, the 
lower axils very patent, the upper equally acute and close. Joints in the 
patent portion of the frond cylindrical, four to five times longer than 
broad; in the erect or upper portion strongly contracted at the nodes, 
swollen in their middle, and thrice as long as broad ; those of the ultimate 
divisions, which taper to a very fine point, resolved into a string of 
elliptical beads. Tetrasporangia in ramuli. 3 mm. to 4 mm. long. Colour 
a fine blood-red. Substance lubricous, not very gelatinous. 
South Australia (Eastern Bays), Tasmania, New Zealand. 
