I/O THE KRKSli-WAIIUs .\L.(;.E OF ESSEX. 



logical Phenomena. C/uunnan.-'SU. G. J. Symoiis. Secnhuy. — .Mr. .\. W. 

 Cla^fden. Professor R. .Meldola, ami .Mr. John Hopkinson. 



To consider the best Methods for the Registration of all Type 

 Specimens of Fossils in the British Isles, and to report on the same. 

 Chaiyman. — Dr. H. VVood-.vard. Secretary. — Mr. A. Smith Wooiward. Rev. G. 

 F. Whidborne, Mr. R. Kidston, and Mr. J. E. Marr. 



THE FRESH-\VATER ALG^E OF ESSEX; 



A PRELIMINARY LIST OF RECORDED SPECIES. 



Bv M. C. COOKE, ]\I.A., LL.D., A.L.S., &c. 



[Read November ^tli, iSg^.^X 



[The following list of the species of Fresh-water Algai (excluding 

 the Diatomacete) hitherto recorded for Essex, has been kindly 

 compiled by Dr. Cooke for the purpose of establishing a starting- 

 point for future recorders, in the hope that botanists will speedily 

 add new species to the catalogue. The few short lists published in 

 our " Journal of Proceedings " have been collated and incorporated, 

 as well as the AlgK recorded by the late Mr. E. G. Varenne in The 

 Essex Naturalist (vol. v., pp. 25-30). In the list the initials, 

 following the localities, are indications of the authority for the 

 record, thus : — 



A.H.H. Dr. A. H. Hassall, author of "Fresh-Water 



Alg.x." 

 E.G. V. The late Mr. E. O. Varenne, of Kelvedon. 

 Q.M.C. Excursion lists of Quekett Microscopical Club 



in the " Journal " of the Club. 

 G.E.M. Mr. G. E.' Mainland. 



The references to figures of the various species are made to 

 Cooke's " British Fresh-Water Algffi," and Cooke's " British 

 1 )esmids," with coloured plates, in which two works all the species 

 are figured. The number of species here recorded is 170 with 

 15 "varieties." 



The Diatomacere have been wholly excluded, and retjuire special 

 investigation.] 



PALMELLACE.F. 



Pleurococcus vulgaris. Men. Cooke, t. 2, f i. On trunks, 

 Epping ; Kelvedon (E.G.V.). 



Paimella hyalina, Breb. Cooke, t. 5, f. 3. In bogs, etc., 

 Kelvedon (E.G.V.) 



P. mooreana, Harv. Cooke, t. 5, f 4. In bogs, etc., Kelve- 

 don (E.G. v.). 



Porphyridium cruentum, Nag. Cooke, t. 5, f. 6. On 

 walls, etc., Kelvecion (E.G.\'.) 



