97 
C. covrymbosum, Lyngb. Not common. 
Hise Elarvey Fil, 271. Plate XVIII, 73: 
District: Port Erin; Port St. Mary; Castletown; Douglas Bay 
(Talbot). 
Zoue; L.W.O.N:1. to L.W.O.S.1. 
Occurrence: Annual, Spring and Summer. 
Reproduction: No data. 
Notes: In pools epiphytic on larger algae. 
C. granulatum, Ag. Occasional. 
Fig.: Harvey III, 272 [as Callithamnion spongiosum}. 
District: Pooyllvaaish; Douglas Bay (Brady, Talbot). 
Zone 2 .W.O.N.1. 
Occurrence: Annual, Summer. 
Gen. Seirospora, Harv. 
S. Griffithsiana, Harv. Rare. 
citgiianvey UN, 248. 
District: Douglas Bay (Miss Thompson). 
Zone: Below L.W.O.S.T. 
Occurrence: Annual, Summer. 
Gen. Compsothamnion, Schm. 
C. thuyoides, Schm. Kare. 
Fig.: Harvey III, 270 [as Callithamnion thuyoides]. 
District: Douglas Bay. 
Notes: Recorded by Mrs. Gatty: no data available. 
Gen. Plumaria, Stachk. 
P. elegans, Schm. Common. 
Fig.: Harvey III, 224 [as Ptilota sericea}. 
District: In all districts. 
Zone: M.T. zone downwards. 
Occurrence: Perennial. 
Reproduction: Polyspores in Winter and Spring; carpogonia 
abundant in March. 
Notes : Common everywhere as a rock covering, not so common in 
pools ; prefers sheltered position in wet crevices or under 
fucoids; often found epiphytic on Laminaria stipes. 
Gen. Ptilota, Ag. 
P. plumosa, Ag. Common. 
Big; Harvey EL, 223. 
District: In all districts. 
Zone: L.W.O.S.T. and below. 
Occurrence: Perennial. 
Reproduction: Tetraspores in Spring and Autumn; polyspores in 
Spring ; cystocarpia in Autumn. 
Notes: Commonly found on Laminaria stipes and in deep pools at 
low water mark. 
