OI 
P. elongata, Grev. Common. 
Fig.: Harvey II, 114 (2 plates). 
District: In all districts. 
Zone: L.W.O.S.T. and below. 
Occurrence: Perennial. 
Reproduction: Cystocarpia in Spring and Summer; tetraspores in 
Summer, spermatia in Spring. 
P. violacea, Grev. Frequent. 
Rie. :, Harvey 1; 115. 
District: Port Erin; Port St. Mary; Castletown; Douglas Bay 
(Brady, Talbot). 
Zone: M.T. zone and below in pools. 
Occurrence: Pseudo-perennial. 
Reproduction: Cystocarpia and spermatia in Spring ; tetraspores in 
Summer. 
P. fibrillosa, Grev. Not common. 
fies: Harvey: If,, 117 
District: Port Erin; Douglas Bay (Mrs. Gatty). 
Zone: M.T. zone in pools. 
Occurrence: Pseudo-perennial. 
Reproduction: In Spring. 
P. fastigiata, Grev. Very common. 
ies: Harvey Il, 127. 
District : In all districts. 
Zone: Same as host. 
Occurrence: Perennial. 
Reproduction : Cystocarpia at all times of the year; spermatia in 
Spring and Autumn; tetraspores in Autumn. 
Notes: Common everywhere on Ascophyllum nodosum. 
P. nigra, Batt. 
Fig.: Harvey II, 125 [as P. atro-rubescens]. 
District: Douglas Bay, Fleshwick Bay. 
Occurrence: Sub-littoral zone. 
Reproduction : Cystocarpia in August. 
Notes: Recorded by Talbot. Dredged in August, 1931. 
ia nisvescens, Grev. Common. 
Bigs: Harvey 1,122. 
District: Port Erin; Port St. Mary; Castletown; Pooyllvaaish. 
Zone: M.T. zone and below in pools. 
Occurrence: Perennial or pseudo-perennial. 
Reproduction: Cystocarpia in Winter and Spring; spermatia only 
recorded for Spring; no record for tetraspores. 
P. Brodiaei, Grev., var. typica, Holm et Batt. Frequent. 
hig: blatvey 1, 118. 
District: In all districts. 
Zone: M.T. zone to L.W.O.N.T. in pools. 
Occurrence: Pseudo-perennial. 
Reproduction: In Winter and Spring; spermatia abundant. 
