83 
Zone: M.T. zone downwards. 
Occurrence: Pseudo-perennial. a 
Reproduction: Spermatia in Spring: cystocarpia in Summer. 
Notes: Very common in pools in the littoral zone in Spring and 
Summer. Absent from littoral zone in Winter but 
recognisable on “‘limpet island’’ flora in January as 
minute plants half-inch long. Antheridial plants smaller 
than the cystocarpic plants. 
Gen. Catenella, Grev. 
ee vepens, Batt. Frequent. 
Fig.: Harvey III, 214 [as C. opuntia]. 
Mistmict: Port Erin, Port St. Mary; Fleshwick; Douglas Bay 
(Brady, Talbot). 
Zone: M.T. zone. 
Occurrence: Annual, Summer. 
Reproduction : Cystocarpia in Summer. 
Notes: Forms dark masses lining the crevices of rocks in shady places 
about half tide zone. Is usually to be found well above 
the zone of Lomentaria articulata, which, apart from 
colour, it somewhat resembles. 
Gen. Euthora, J. Ag. 
i. cyistata, J. Ag. Very rare. 
Fig.: Harvey II, 180 [as Rhodymenia siastata 
District: Peel; Douglas Bay (Talbot). 
Zone: L.W.O.S.T. 
Occurrence: Annual, Summer. 
Reproduction : Cystocarpia in Summer; Tetraspores not recorded. 
Gen. Rhodophyllis, Kutz. 
Rk. bifida, Kitz. Frequent. 
big: HEHlarvey. Il, 177 [as ee bifida}. 
District: In all districts. 
Zone: L.W.O.S.T. and below. 
Occurrence: Pseudo-perennial. 
Reproduction: Tetraspores and cystocarpia at all times of the year ; 
most abundant in Spring and Summer. Tetraspores and 
cystocarpia on separate plants. 
Fam. SPHAEROCOCCACEAE. 
Gen. Sphaerococcus, Grev. 
S. corvonopifolus, Grev. Not common. 
hie: Elarvey II, 184. 
District: In all districts. 
Zene: Below L.W.O.S8.1. 
Occurrence: Annual, Summer. 
Reproduction: Tetraspores and cystocarpia in Summer. 
Notes: Though not a rarity this plant occurs as single individuals in 
deep water. Usually found as a cast-up. 
