THE MARINE ALG/E OF ESSEX. 9 



respects the specimens agree fairly well with typical CI. glaucescens. 

 This variation from the ordinary form may be accounted for by the 

 locality where Mr. Hope gathered his specimens, for he notes that 

 they were gathered in a '* sluice at high-water covered with 8 feet 

 of salt water, at low water covered with fresh water." 



C. fracta, Kiitz, '' Phyc. Gener.," p. 263. In ditches of 

 brackish water between Felixstowe Railway-station and the River. 

 Not uncommon ; in many places plentiful. June, 1885, E. A. B. 



C. albida, Kiitz, " Phyc. Germ.," p. 240, f. refracfa, Thur., in 

 Le JoL, " Liste Alg. Mar. Cherb.," p. 60. Felixstowe, Hope ; 

 between Harwich and Dovercourt, E. M. Holmes. 



C. uncialis, Harv., "Phyc. Brit.,'" pi. 207. Felixstowe and 

 Harwich, G. Hope. 



Bryopsidaceae, Thur. 



BRYGPSIS, Lam. 



Bryopsis plumosa, Ag., " Spec. Alg.," i., p. 448. " In a 

 rock pool near the end of Southend Pier," W. H. Grattann, "British 

 Marine Alga3,'' p. 21; Harwich, Felixstowe, ''in pools formed in 

 cement stone with sandy bottom," G. P. H. 



Vaucheriaceae, Damort. 



VAUCHERIA, D. C. 



Vaucheria sphaerospora, Nordst., Algol. Smasaker, in "Bot. 



Not.,'" 1S79, t. 2. Maldon, "one mile on both sides of the bridge," 



Prof. Otto Nordstedt. [See E. M. Holmes, Essex Naturalist, 



vol. i., p. 151.] 



FUCOIBE.E, J. Ag. 



Punctariaceae. 



PUNCTARIA, Grev. 



Punctaria plantaginea, Grev., "Alg. Brit.," p. 53, t. 9. 

 Harwich, 1876, Varenne. 



Ectocarpaceae. 



ECTOCARPUS, Lyngb. 



Ectocarpus erectus, Kiitz, "Tab. Phyc," vol. v. On wood- 

 work, in company with species of Eniero?norpha, Calothnx^ and 

 other small algae. Clacton, Jan- 1893, E. A. B. Rare. 



