82 
Gen. Ahnfeldtia, Fries. 
A. plicata, Fries. Common. 
Fig.: Harvey III, 205 [as Gymmnogongrus plicatus]. 
District : In all districts. 
Zone: L.W.O.N.T. and below. 
Occurrence: Perennial. 
Reproduction : Nemathecia in Spring. 
Notes: According to Rosenvinge, the so-called parasite, Stevvocolax 
decipiens, is the true nemathecium of the dAhnfeidtia. 
Gen. Actinococcus, Kiitz. 
A. subcutaneus, Rosenv. Rare. 
Fig.: Rosenvinge, 1929. ‘‘ Phyllophova Brodiaei.and Actinococcus 
subcutaneous.” ) 
District >) Port Exin 3 “Port St. Mary. 
Notes: Parasitic on Phyllophora Brodiaei. Recorded by R. J. Harvey- 
Gibson. No other data available. According to Rosen- 
vinge Actinococcus is an asexual generation of Phyl. 
Rrodiaei growing parasitically on the sexual generation. 
Gen. Sterrocolax, Schm. 
S. decipiens, Schm. Frequent (see note 15, p. 115). 
Fig. : Rosenvinge (1930). 
District: Same as host. 
Zone: Same as host. 
Note: Parasitic on Ahnfeldtia plicata; see notes under Ahnfeldtia. 
Gen. Callophyllis, Kiitz. 
C. laciniata, Kitz. Not uncommon. 
Fig.: Harvey II, 178 [as Rhodymenia laciniata]. 
District: Port Erin; Port St. Mary; Douglas Bay (Talbot); Peel. 
Zone: EZ W:O.ND. and below: 
Occurrence: Pseudo-perennial. 
Reproduction: Tetrasporic plants predominate in Spring ; cystocarpic 
plants in Summer. 
Gen. Callymenia, J. Ag. 
C. reniformis, J. Ag. Very rare. 
Piss: Marvey un 2mm 
Distuct: Port Erin: 
‘Notes: Occasional only; cast ashore. 
Fam. RHODOPHYLLIDACEAE. 
Gen. Cystoclonium, Schm. 
C. purpureum, Batt. Common. 
Fig.: Harvey II, 189 [as Hypnea purpurascens]. 
District: In all districts. 
