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C. acanthonotum, Carm. Frequent. 
Big. Harvey Til 237. 
District: In all districts. 
Zone: M.T. zone and below in pools. 
Occurrence: Pseudo-perennial or perennial. 
Reproduction: Tetraspores in Spring. 
Gen. Microcladia, Grev. 
M. glandulosa, Grev. Occasional. 
Fig.: Harvey III, 225. 
District: Port Erin; Douglas Bay (Talbot). 
Zone: Cast ashore. 
Occurrence: Annual, Summer. 
Reproduction: No data. 
Fam. GLOIOSIPHONIACEAE. 
Gen. Gloiosiphonia, Carm. 
G. cabillaris, Carm. 
bigs: Harvey Mil, 297. 
District: Douglas Bay. 
Note: Recorded by Talbot; no data available. 
Fam. DUMONTIACEAE. 
Gen. Dumontia, Lamour. 
D. incrassata, Lam. Common. 
Fig.: Harvey III, 208 [as Dumontia filiformis]. 
District: In all districts. 
Zone: H.W-O.N.1. to below W-O:sae 
Occurrence: Anuual, Spring and early Summer. 
Reproduction: Cystocarpia, spermatia and tetraspores in Spring. 
Notes: Appears in February but is covered by epiphytes at the end 
of May; disappears in July and August; sexual plants 
smaller than tetrasporic plants. 
Gen. Dudresnaya, Bonnem. 
D. verticillata. Le Jol. 
Fig.: Harvey III, 220 [as D. coccinea, Crn.]. 
District : Fleshwick Bay ; Bay Fine. 
Zone: Sub-littoral. | 
Occurrence: Annual, Summer. | 
Reproduction : Cystocarpia in August. | 
Notes : Dredged on stones from deep water. 
Gen. Dilsea, Stackh. 
D. edulis, Stackh. Frequent. 
Fig.: Harvey III, 213 [as Ividaea edulis]. 
District: In all districts. 
Zone: L.W.O.N.T. to below L.W.O.S.T. 
Occurrence: Perennial. 
Reproduction: Tetraspores in October and November. 
Notes: Occurs in very deep pools and on rocks below low water mark. 
