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S. bipinnata, Sauv. Frequent. (See note 8, p. 112.) 
Fig.: Clint, 1927. 
District: Port Erin; Port St. Mary; Castletown ; Pooyllvaaish. 
Zone: L.W.O.S.T. 
Occurrence: Perennial. 
Reproduction : Unilocular and plurilocular sporangia developed in the 
Summer. 
Notes: Found as an epiphyte on Halidrys siliquosa in deep pools at 
low water mark. 
Gen. Chaetopteris, Kitz. 
Ch. plumosa, Kitz. Occasional. 
Fig.: Harvey I, 75 Las Sphacelaria plumosa]. 
District : Port Erin; Douglas Bay (Talbot) ; Peel. 
Zone = .W.O.N.T. 
Occurrence: Perennial. 
Reproduction: Unilocular sporangia in Spring. 
Notes: Occasional in deep pools at low water mark or sometimes 
cast up. 
Gen. Cladostephus, Ag. 
C. spongiosus, Ag. Frequent. 
Bie. : Harvey 1, 71. 
District : In all districts. 
Zone: M.T. zone and below. 
Occurrence: Perennial. 
Reproduction: Unilocular and plurilocular sporangia on separate 
individuals in Winter. 
Notes: Generally found on sand or mud-covered rocks. 
C. verticillatus, Ag. Frequent. 
Fig.: Harvey I, 7o. 
District: Port Erin; Port St. Mary; Douglas Bay (Talbot); Peel; 
Pooyllvaaish. 
Zone: M.T. zone and below. 
Occurrence: Perennial. 
Reproduction: Unilocular and plurilocular sporangia in Winter. 
Gen. Halopteris, Kiitz. 
Hi. fiicina, Kitz. Very rare. 
Fig.: Harvey I, 72 [as Sphacelaria filicina]. 
District : Port Erin; Port St. Mary. 
Zone: L.W.O.S.T. and below. 
Occurrence: Perennial. 
Reproduction: Unilocular sporangia in Spring. 
