284 Mr George Traill on the 



Tribe II. — Euchordarie^. 

 CHORDABIA, Ag. 



63. Chordaria flagelliformis (Miill., Fl. Dan.), Ag. 



Common in pools between tide marks. Annual. April to 

 November. Fruit in August. 



Tribe III. — MESOGLCEEiE. 

 MESOGLOIA, Ag. 



64. Mesogloia vermicularis (£'Hr/. BoL), Ag. 



Generally a little below low-water mark on stones and rocks ; 

 also epiphytic on Algse. Always submerged. Annual. Summer. 

 Host plants: Polyides rotundus, Furcellaria fastiyiata, Phylluphora 

 Broduei. 



CASTAGNEA (Derb. et Sol), Thuiet. 



65. Castagnea virescens (Carm.), Tliur. {Mesoijloia virescens, Carm.) 

 Common on rocks and stones in pools at about half-tide level; 



very rarely epiphytic on Laurencia hyhrida, and other Algae. 

 Always submerged. Annual. Spring and summer. In pools at 

 several places ; especially to the east of the boys' bathing pool. 



Family.— ASPEEOCOCCACE.E. 

 ASPEROGOCGUS, Lamour. 



66. Asperococcus echinatxis (Ag.), Grev. 



Common at many places in shallow sunny pools from near high- 

 water mark to about half-tide level. Always submerged. Often 

 epiphytic on Algse. Annual. April to October. Sporangia in 

 summer. The variety vermicularis also occurs. Host plants : 

 Cladopliora rupestris, CoralUna officinalis, Hcdidrys dliquosa, 

 rarely, Polysiplionia fihrillosa, rarely, Gystoclonium purj)icrascens, 

 rarely, Fucas vesiculosus, rarely. 



Family.— LAAIINAKIACE^ 

 CHORDA, Stackh. 



67. Chorda filum (Liun.), Stackh. 



Chiefly in sandy bays, from a little above low-water mark to 4 or 

 5 fathoms of water. Annual. Ajjril to December. Fruit in July 

 and August. Not plentiful. 



ALARIA, Grev. 



68. Alaria esculenta (Linn.), Grev. 



Very plentiful, and often of large size, in exposed places at about 

 low-water mark. Ahvays submerged. Young plants about March. 

 Perennial. Fruit in winter. 



