256 Marine Algas of Berwick-on-Tweed. 



The late Miss Cutler bequeathed her collection of seaweeds, 

 bound in two volumes, to the British Museum on the condition 

 that it should always be kept exactly as she left it. Mr. 

 Geo. Murray has most obligingly twice searched these volumes 

 through from beginning to end without finding a trace of Ulothrix 

 (Lyngb} r a Haw.,) Cutlerice, or anything like it. He, however, 

 found amongst the other Algae preserved at the British Museum 

 a specimen collected at Budleigh and sent to Mrs. Griffiths, 

 labelled " Lyngbya Cutleries;" this, on examination, turned oiit 

 to be indistinguishable from Ulothrix isogova. 



I am indebted to Mr E. H. Farr for two specimens of Harvey's 

 plant taken from an album containing a collection of sea-weeds 

 made many years ago by Miss Cutler herself. The album 

 contained four or five specimens of this species. One of them 

 labelled "Lyngbya Cutlerise 'New' Budleigh Salterton, April 

 17th, 1850 " seems to have been gathered at the same time and 

 place as the specimens which she sent to Harvey, and on which 

 he founded the species. Like the two preceding specimens, on 

 examination it proved to be quite indistinguishable from Ulothrix 

 isogona. 



I am indebted to Mr. T. H. Buffham for the following 

 particulars of the specimens referred to above. 



Specimen of Lyngbya Cutlerise, Harv., from the Harveyan 

 collection, in the Linnean Society's possession. 



Fertile cells -043— -061 mm. broad, by -018— -030 mm. long. 

 Owing to the curling habit of the filaments the zoosporic 



mass has become ovoid in shape, the smaller end of the mass 



being, of course, towards the inner side of the curve. 

 Specimen from the British Museum Herbarium. 



Fertile cells -041— '046 m.m. broad, by -028— -052 m.m. 



long, zoosporic mass nearly globose. 

 Specimens from Miss Cutler's album now in the possession of 

 Mr E. H. Farr. 



Fertile cells -040— -046 broad, by -041— -060 m.m. long. 



Barren cells -023 — -062 m.m. broad, by -024— -088 m.m. 



long, generally about as long as broad. 



Ulothrix flacca (Dillw.) Thur. 



In Le Jol., Liste Alg. Mar. Cherb., p. 56. — Conferva flacea, 

 Dillw., Brit. Conf. t. 49. 

 Descr. Lyngbya flacca, Harv., Phyc. Brit. 

 Fig. „ „ Harv., I.e. pi. 300, 



