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148 MARINE ALG^ OF DEVON.
*Melobesia Thureti Born. Sidmouth, E. M. H.— *M. Lenormandi
Aresch. Torquay, Plymouth, Sidmouth, Lynmouth, &c., E. M. H.
—M. LamiyiaricB Crn. Sidmouth, &c., E. M. H. — ^-M. CorallinoR
Crn. Sidmouth, &c., E. M. H.
Delesseria angustissima J. Ag. It is extremely doubtful if this
northern plant was found at Ilfracombe by Mr. Grifi&ths, as Mr.
Parfitt states.
'^Xitojihylium
E. M. H.
wicinatum J. Ag. Ladram Bay, Sidmouth,
Rhodijinenia nicieensis Holmes. Torquay, E. M. H.
*Grateloupia dichotoma J. Ag. Eennie Eocks, Plymouth, E. M. H.
— G.Jilicina. Lynmouth, E. M. H.
Microcladia glandulusa Grev. This plant was found parasitical
but at Falmouth I have seen
on stems of Laminaria near Brixham :
it growing on rocks at low water, E. M. H.
'' Calhithmnnion plumula J. Ag., var. Abundant at Mount Edgcumbe,
Plymouth, E. M. H.
'^'Monospora clavata Solier. Sidmouth, E. M. H.
Codiolum gregariuin A, Br. Lynmouth, E. M. H.
*Monostro7na latisswnim Wittr. Budleigh Salterton, Fiev, 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. ( Vancheria marina Harv.). Ladram Bay,
Sidmouth, E. M, H. There appears to be some mistake about the
Vaucheria marina mentioned by Mr. E. Parfitt, since B. marina
usually grows parasitically on other algffi, and not on mud ;
whilst
V. dichotoma var. suhmarina grows freely on mud.
Calothrix pannosa Ag. This plant is C. pulvinata of Agardh. —
C. seniiplena Harv. This is Symploca Harveyi Le Jol. C. hydnoides
Harv. This is Calothrix indvinata Ag.
'^'Symploca fasciculata Kg. On corallines, Ladram Bay, E.M.H.
*Dermocarpa prasinu Eeinsch. On Catenella, Sidmouth, E. M. H.
Lyngbya Carmichaeli Harv., L. speciosa. and L. Cutlerice are now
usually referred to the genus Vlothric as U. fiacca Thur., U. speciosa
Ktz., and U. isogona Thur. respectively, although by a few algolo-
gists they are included under a single sjpecies, Urospora penicilliferum
Aresch.* It is, however, to say the least, convenient to keep
the plants distinct, since they differ in habit as well as in measurements
and consistence.
I may add, in conclusion, that Mr. H. Johnston dredged Carpomitra
Cabrera, Stenogramme interrujAa, Gigartina pistillata, and
Gramdaria vmltipartita in Plymouth Sound last year, so that these
very rare British species are evidently natives of Devon. I also
found the still rarer Gigartina Teedii in its sole British locality
near Torquay, two years ago.
De Tuni, ' yyllogo Algarum,' p. 232.