35 
Fam. VAUCHERIACEAE. 
Gen. Vaucheria, D.C. 
V. Thuretii, Woron. 
Fig.: Harvey IV, 288 [as Vaucheria veiutina]. 
District: Port Erin; Port St. Mary. 
Zone: M.T. zone. 
Notes: Scraped from the surface of limpets. No other data available. 
Fam. SPONGODIACEAE. 
Gen. Codium, Stackh. 
C. adhaerens, Ag. Very rare. 
Fig.: Harvey IV, 281. 
District: Port St. Mary. 
Zone: M.T. zone. 
Occurrence: Perennial. 
Reproduction: No data. i 
Notes: Found in one locality only ; patch about 2 ft. square in area. 
C. amphibium, Moore. Very rare. 
Fig.: Harvey IV, 282. 
District: Perwick Bay; Port St. Mary. 
Notes: Has not been observed by authors ; recorded in Batters’ list. 
C. tomentosum, Stackh. Frequent. 
Fig.: Harvey IV, 283. 
District: In all districts. 
Zone: M.T. zone to L.W.O.N.T. 
Occurrence: Perennial. 
Reproduction: Winter and early Spring. 
Notes: C. tomeniosum generally occurs in deep pools, reaching 
Maximum size in the Winter. 
C. mucronatum, var. atlanticum, Cott. Frequent. 
Fig.: Cotton, 1912. 
District: Port Erin; Port St. Mary. 
Zone: M.T. zone. 
Occurrence: Pseudo-perennial or perennial. 
Reproduction : Summer. 
Notes: In pools. 
PHAEOPHYCEAE. 
Sub-Order. PHAEOSPOREAE. 
Fam. DESMARESTIACEAE. 
Gen. Desmarestia, Lamour. 
D. viridis, Lamour. Frequent. 
Fig.: Harvey I, 19. 
District: In all districts. 
Zone: L.W.O.S.T. in deep pools. 
Occurrence: Annual. 
Reproduction: Summer. 
