148 MAKINE ALG.E OF DEVON. 



*Melobesia Thureti Born. Sidmouth, E. M. H. — *M. Lenormandi 

 Aresch. Torquay, Plymouth, Sidmouth, Lyumouth, &c, E. M. H. 

 — M. Laminarice Crn. Sidmouth, &c, E. M. H. — *M. Coralline 

 Cm. Sidmouth, &c, E. M. H. 



Delesseria angustissima J. Ag. It is extremely doubtful if this 

 northern plant was found at Ilfracombe by Mr. Griffiths, as Mr. 

 Parfitt states. 



*Nitophyllwm uncinatum J. Ag. Ladram Bay, Sidmouth, 

 E. M. H. 



Rhodymenia nicaensis Holmes. Torquay, E. M. H. 



*Grateloupia dichotoma J. Ag. Rennie Rocks, Plymouth, E. M. H. 

 — G.jilicina. Lynmouth, E. M. H. 



Microcladia glandulosa Grev. This plant was found parasitical 

 on stems of Laminaria near Brixham : but at Falmouth I have seen 

 it growing on rocks at low water, E. M. H. 



*CaUithamnion plumula J. Ag., var. Abundant at Mount Edg- 

 cumbe, Plymouth, E. M. H. 



*Monospora clavata Solier. Sidmouth, E. M. H. 

 Codiolum gregarium A. Br. Lynmouth, E. M. H. 



■''Monost?-oma latissimum Wittr. Budleigh Salterton, Rev. R. Cress- 

 well. — *M. Grevillei J. Ag. Torquay, E. M. H. — *M. Wittrockii 

 Born. Plymouth, R, V. Tellam. 



*Prasiola marina Cr. Pier, Torquay, E. M. H. 

 Derbesia marina Solier. ( Vaucheria marina Harv.). Ladram Bay, 

 Sidmouth, E. M, H. There appears to be some mistake about the 

 Vaucheria marina mentioned by Mr. E. Parfitt, since D. marina 

 usually grows parasitically on other algae, and not on mud ; whilst 

 V. dichotoma var. submarina grows freely on mud. 



Calothrix pannosa Ag. This plant is C. pulvinata of Agardh. — 

 C. semiplena Harv. This is Symploca Harveyi Le Jol. — C. hydnoides 

 Harv. This is Calothrix pulvinata Ag. 



* Symploca fasciculata Kg. On corallines, Ladram Bay, E. M. II. 



*Dermocar]>a prasina Reinsch. On Catenella, Sidmoutb, E. M. II. 

 Lynybya Carmichaeli Harv., L. speciosa. and L. Cutleries, are now 

 usually referred to the genus Vlothrix as U. Jiacca Thur., U. speciosa 

 Ktz., and U. isoyona Thur. respectively, although by a few algolo- 

 gists they are included under a single species, Urospora penicilli- 

 ferum Aresch.* It is, however, to say the least, convenient to keep 

 the plants distinct, since they differ in habit as well as in measure- 

 ments and consistence. 



I may add, in conclusion, that Mr. H. Johnston dredged Carpo- 

 mitra Cabrera, Stenogramme interrupta, Giyartina pistillata, and 

 Granularia multipartita in Plymouth Sound last year, so that these 

 very rare British species are evidently natives of Devon. I also 

 found the still rarer Giyartina Teedii in its sole British locality 

 near Torquay, two years ago. 



De Toni, ' Syllogu Algarum,' p. 232. 



