104 
Gen. Phymatolithon, Fosl. 
P. polymorphum, Fosl. Frequent. 
Fig.: Harvey II, 152 [as Melobesia polymorpha}. 
District: Port! Enns: Port St) Mary: 
Zone: M.T. zone downwards. 
Occurrence: Perennial. 
Reproduction: No data. 
Notes: On rocks and stones; very often found growing on limpet 
shells. 
Gen. Corallina, Lamour. | 
C. officinalis, L. Abundant. 
Bigs s walanveys likin 7: 
District: In all districts. 
Zone: M.T. zone downwards. 
Occurrence: Perennial. 
Reproduction: Tetraspores and cystocarpia in Winter and Spring. 
Notes: Common on all coasts except boulder beaches; frequent in 
pools. 
C. squamata, Ellis. Not common. 
Fig.: Harvey II, 149. 
District: Port St. Mary. 
Zone: L.W.O.N.T. downwards. 
Occurrence: Perennial. 
Reproduction: Tetraspores and cystocarpia in Summer. 
C. vubens, Ellis et Solan. Occasional. 
Fig.: Harvey II, 150 [as Janta rubens]. 
District: Port enn. Port St, Many. becel: 
Zone | Ei W-O3N- isto, LW-O:s-de 
Occurrence: Perennial. 
Reproduction: Tetraspores in Spring. 
Notes: Epiphytic on the smaller algae on rock surfaces or in pools. 
C. rubens, var. covniculaita, Hauck. Occasional. 
Fig.: Harvey II, 151 [as Jania corniculata). 
District: Port Erin. 
Zone: M.T. zone downwards. 
Occurrence: Perennial. 
Reproduction: In Spring and Summer. 
Notes: Epiphytic on the smaller algae in pools, also occurs in deep 
water. 
Gen. Rhododermis, Crn. 
R. elegans, Crn. Not uncommon. 
Fig.: Rosenvinge, (1909) Pt. II, p. 108. 
District: Port Erin; Port St.. Mary. 
Zone: L.W.O.N.T. downwards. 
Occurrence: Perennial. 
Reproduction: Tetrasporangia developed in Winter. 
Notes: Occurs on stones, shells, carapaces of animals and on other 
algae. 
