A HISTORY OF DEVONSHIRE 



DIATOM ACE AE {continued) 



Homoeocladia martiana, C. Ag. i, 6 

 Isthmia enervis, Ehr. 



— nervosa, Kfltz. 

 Licmophora flabellata, C. Ag. i 

 Mastogloia Danseii, Thw. 

 Melosira varians, C. Ag. I 

 Micromega comoides, C. Ag. 1 



— gracillimum, W. Sm. 6 



— laciniatum, Harv. 6 



— molle, W. Sm. 5 



— obtusum, Grev. 6 



— parasiticum, Harv. i 



— ramosissimum, C. Ag. I, 6 



— Smithii, C. Ag. i, 6 



— torquatum, W. Sm. 6, 7 

 Nitzschia Taenia, W. Sm. i 

 Odontidium hyemale, Klitz. i 

 Pleurosigma quadratum, W. Sm. I 



— transversale, W. Sm. 

 Podosira Montagnei, Ktttz. 6 

 Fodosphaenia Jurgensii, Katz. 6 



DIATOMACEAE {continued) 



Raphidospora paradoxa, Ktttz. 



— poliaeformis, Ktltz. i 

 Khabdonema adriaticum, Kfltz. i 

 Schizonema Dillwynii, C. Ag. I, 6 



— dubium, Harv. 6 



— fasciculatum, C. Ag. 6 



— Grevillei, C. Ag. I, 6 



— helminthosum, Chauv. 6 



— implicatum, Harv. 7 



— virescens, C. Ag. I 



RHODOPHYCEAE 



Batrachospermaceae 



Batrachospermum monlliforme, Roth. 7 

 var. confusum, Harv. 7 



— vagum, C. Ag. 8 



Lemaneaceae 

 Lemanea fluviatilis, C. Ag. i, 4, 6, 7 



ALGAE (MARINE) 



Few counties in Great Britain with a rocky coastline have been so 

 thoroughly worked for marine algae as Devonshire. The earlier records 

 are some of them very doubtful, as many of the species were not well 

 understood at the end of the eighteenth century. Thus in Jones and 

 Kingston's Flora Devoniensis the following species are recorded which are 

 extremely unlikely to have occurred, and then can only have been in the 

 form of drift weed, or detached from ships visiting the Devonshire ports 

 from the north of England or the Mediterranean. Of these Odonthalia 

 dentata, Lyngb., is recorded by Withering, and Fucus [Cystoseird) barbatus. 

 Turn, by Hudson and Stackhouse. Specimens of the Gulf weed, Sar- 

 gassum nutans and S. bacciferam have undoubtedly been thrown up on the 

 beach here and there after storms from the south-west, either brought by the 

 Gulf Stream, or thrown overboard when nearing English shores, by sailors 

 who had collected it as a curiosity. At the date of publication of the 

 above-mentioned work in 1829, 106 species of seaweed were recorded as 

 natives of Devonshire, excluding the doubtful species. 



Mrs. A. W. Griffiths, who died at Torquay in 1857, was regarded 

 by Professor Harvey as ' facile regina ' of British algologists, and probably 

 did more than any other algologist of her day in discovering new British 

 species and recording accurate observations on the life history of these 

 plants. She superintended the issue by Mary Wyatt of four fasciculi 

 of Algae Devonienses, which are still extant in most of our national 

 museums and in many private collections. Miss Cutler, of Sidmouth, 

 who died in 1866, contributed largely to the knowledge of the seaweeds 

 of district 5 ; and Mrs. Gulson, of Exmouth, discovered the very rare 

 Atractophora hypnoides near that town. Dr. J. Cocks, of Plymouth, who 

 died at Devonport in 1 86 1, published at Plymouth a series of eighteen fas- 

 ciculi of British seaweeds between 1855 and 1 860, illustrating the majority 

 of the species found in that neighbourhood. He was the first to detect 



no 



