94 
Gen. Griffithsia, Ag. 
G. corvallinoides, Batt. Not uncommon. 
Fig.: Harvey III, 244 las Griffithsia corallina). 
District: Port Erin; Port St. Mary; Castletown; Douglas Bay 
(Miss Thompson). 
Zoue : Mi zone to L2WsOin. &. 
Occurrence: Annual, Spring and Summer. | 
Reproduction : Cystocarpia, spermatia and tetraspores in July and | 
August. : 
Notes: Plentiful in some years, hard to find in others. 
G. flosculosa, Batt. Frequent. 
Fig.: Harvey III, 246 [as Griffithsia setaceaj. 
District: In all districts. 
Zone: M.T. zone to below L.W.O.5.T. 
Occurrence: Pseudo-perennial. 
Reproduction: No periodicity in reproduction; tetrasporic plants 
most abundant; spermatia bearing plants rare. 
Notes: Plants growing in deep water very much larger than those 
found in M.T. pools. 
Gen. Halurus, Kiitz. 
H. equisetifolius, Kitz. Not common. 
Fig.: Harvey III, 240 [as Griffithsia equisetifolia). 
District: Port Erin; Port St. Mary; Castletown; Pooyllvaaish. 
Zone: i:.W.OuNCE. to -LIW-OlSet: 
Occurrence: Pseudo-perennial. 
Reproduction : Spermatia in Autumn. 
Hi. equisetifolius, Kiitz, var. simplicifilum, J. Ag. Very rare. 
Fig.: Harvey III, 241 [as Griffithsia simplicifilum|]. 
District: Port St. Mary. 
Zone 2. 1:W:OL NA. toe. W-O.S 
Occurrence: Pseudo-perennial. 
Reproduction: No data. 
Gen. Monospora, Solier. 
M. pedicellata, Sol. Not common. 
Fig.: Harvey III, 273 [as Callithamnion pediceilatum). 
District: Port Erin; Port St. Mary; Castletown; Pooyllvaaish. 
Zone: L.W.O.N.T. and below in pools. 
Occurrence: Annual, Summer. 
Reproduction: In Summer by monospores. 
Gen. Pleonosporium, Nag. 
P. Borveri, Nag. Rare. 
Fig.: Harvey III, 266 [as Callithamnion Borreri}. 
District: Port Erin; Douglas Bay (Mrs. Gatty). 
Zone: L.W.O.5.T. as an epiphyte. 
Occurrence: No data. 
