53 
C. gracilis, Kitz. Uncommon. 
Fig.: Harvey IV, 300. 
District: Port Erin; Port St. Mary; Douglas Bay (Talbot). 
Zone: L.W.O.S.T. 
Occurrence: Annual. 
Reproduction: No data. 
Notes: Deep water form only obtained at low water of spring tides 
in summer. 
C. flexuosa, Harv. Rare. 
Fig.: Harvey IV, 299. 
District: Port Erin. 
Zone: L.W.O.S.T. 
Occurrence: Annual, Summer. 
Reproduction: Summer. 
Notes: Generally occurs in deep pools at low water and below. 
C. albida, Kitz. Not uncommon. 
Fig.: Harvey IV, 304. 
District: Port St. Mary; Douglas Bay (Mrs. Gatty). 
Zone: M.T. zone and below. 
Occurrence: Annual, Summer. 
Reproduction: Summer. 
Notes: Occurs on rocks and in pools. 
C. albida, Kitz, var. vefracta, Thur. Not common. 
Fig.: Harvey IV, 303 [as C. refracta]. 
District: Port Erin; Douglas Bay (Brady). 
Zone: L.W.O.S.T. 
Occurrence: Annual, Summer. 
Reproduction: No data. 
Notes: In pools and on rocks at low water of Spring tides. 
C. fracia, Kitz, var. marina, Hauck. 
Fig.: Harvey IV, 313. 
District : Port Erin. 
No other data available. Recorded by R. J. Harvey-Gibson. 
C. fracta, Kiitz, var. flavescens, Batt. Not common. 
Fig.: Harvey IV, 312 [as C. flavescens]. 
District: Port Erin; Pooyllvaaish. 
Zone: H.W.O.N.T. 
Occurrence: Pseudo-perennial. 
Reproduction: Frequent all the year, maximum in Spring. 
Notes: In stagnant pools in upper third of littoral zone. 
C. avcta, Kitz. Frequent, common locally. 
Fig.: Harvey IV, 307. 
District: Port Erin; Port St. Mary; Castletown; Douglas Bay 
(Talbot). 
Zone: All zones. 
Occurrence: Perennial. 
Reproduction : Spores March to September. 
Notes: Forms an almost complete carpet near low water mark on 
the limestone ledges at Castletown; also occurs in pools 
in all zones up to high water mark. 
