gO 
C. dasyphylla, Ag. Occasional. 
Fig: Harvey II, 138 [as Laurencia dasyphylla]. 
District: Port Erin; Peel. 
Lone WW ©: sealy: 
Occurrence: Annual, Summer. 
Reproducticn; Antheridia in July; no other data available. 
Gen. Polysiphonia, Grev. 
P. fibrata, Harv. | 
ict. Harvey Ul> roe: 
District: Douglas Bay. 
Notes: Recorded by Brady and Batters; no data available. 
P. urceolata, Grev., var. typica, J. Ag. Common. 
Fig. ; Harvey If, 106. 
District : In all districts. 
Zone: Mol. zone. tor L-W-OSsa: 
Occurrence: Pseudo-perennial. 
Reproduction: Cystocarpia and spermatia in Spring and Autumn; 
tetraspores in Winter and Spring. 
Notes: Pool alga in mid-tide zone, also component of general rock 
covering in lower littoral zone. Disappears in early winter 
but re-attached fragments shew vigorous growth from 
February onwards. 
P. spinulosa, Grev. Very rare. 
Bic Harvey aii) 110. 
District: Port St. Mary. 
Zone: M.T. zone. 
Occurrence: Pseudo-perennial. 
Reproduction: Cystocarpia in Autumn. 
P. spinulosa, Grev., var. major, J. Ag. Not common. 
Fig.: Harvey II, 116 [as P. Carmichaeliana]. 
District: Port Erin; Castletown. 
Zone: Same as host. 
Occurrence: Annual, Summer. 
Reproduction : Cystocarpia in Summer. 
Notes: Only found growing as an epiphyte on Desmarestia aculeata. 
P. elongella, Harv. Rare. 
Rigo Harvey 7h 113: 
District: Port Erin; Port St. Mary; Castletown; Douglas Bay 
(Gatty, Talbot). 
Zone: L.W.O.N.T. and below. 
Occurrence: Pseudo-perennial. 
Reproduction: No data. 
Notes: On rocks and stones and on the smaller algae near low water 
mark and at greater depth. 
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