324 THE ESSEX NATURALIST
Phyllophoraceae
Gracilaria verrucosa (Huds.) Papenf. Harwich, Walton, Orwell and
Stour, Felixstowe, Clacton, Batters (1894); River Blackwater (St.
Peters Flats, Bradwell Creek, mouth of Goldhanger Creek, Thirslet
Spit, Cocum Hills, Mersea Stone, Stoney Point, Decoy Point), G.M.M.,
1963-64,
Phyllophoraceae
Ahnfeltia plicata (Huds.) Fries. Felixstowe, Southend, Clacton,
Batters (1894).
Gymnogongrus griffithsiae (Turn.) Mart. Felixstowe, Dovercourt,
Batters (1894).
Gymnogongrus norvegicus (Gunn.) J. Ag. Felixstowe, Batters (1894).
Phyllophora crispa (Huds.) Dixon Felixstowe, Clacton, Batters
(1894) (as P. rubens Grev.).
Phyllophora membranifolia (Good. et Woodw.) J. Ag. Harwich,
Felixstowe, Dovercourt, Batters (1894).
Gigartinaceae
Chondrus crispus Stackh. Harwich, Felixstowe, Dovercourt, Clacton,
Batters (1894); River Blackwater, Harwich, G.M.M., 1963, 64.
Cryptonemiales
Squamariaceae
Peyssonelia dubyi Crouan frat. Blackwater Estuary, Batters (1894)
(as Cruoriella dubyi Schmitz).
Porphyrodiscus simulens Batt. River Blackwater (Southey Creek,
Osea Island, Bradwell Creek, Mersea Shore, Colne Point), G.M.M.,
1963.
Hildenbrandiaceae
Hildenbrandia prototypus Nardo Estuaries of the Orwell and Stour,
Southend, Clacton, Felixstowe, Batters (1894); River Blackwater
(Osea Island, East Mersea Stone, Colne Point, Mersea Shore),
G.M.M., 1963.
Corallinaceae
Corallina officinalis L. Walton, Felixstowe, Dovercourt, Harwich,
Clacton, Batters (1894); River Blackwater (St. Osyth, Mersea
Quarters, Osea Island, Ray Creek, Colne Point, Mersea Shore,
Cocum Hills, Decoy Point), G.M.M., 1963.
Epilithon membranaceum. (Esper) Heydr. Blackwater Estuary,
Clacton, Batters (1894) (as Melobesia membranacea Lamour.).
Jania corniculata (L.) Lamour Dovercourt, Batters (1894) (as
Corallina corniculata L.).
Jania rubens CL.) Lamour Harwich, Dovercourt, Batters (1894) (as
Corallina rubens L.).
Lithophyllum corallinae Crouan frat. Harwich, Felixstowe, Dover-
court, Batters (1894) (as Melobesia corallinae Crouan.).
Lithothamnion lenormandii (Aresch.) Fosl. Blackwater Estuary,
Batters (1894) (as Lithophyllum lenormandii Roasn.); River Black-
water (Thirslet Spit, Osea Island, Cocum Hills, Colne Point, Ray
Creek), Harwich, G.M.M., 1963-64.