THE 
OST N Bee Oe BOTANY 
BRITISH AND FOREIGN. 
GUS g 
NEW OR CRITICAL BRITISH MARINE ALGZ. 
By E. A. L. Barrers, B.A., LU.B., F.L.S. 
(Puate 475.) 
Durine the past year several new or critical species have been 
— to the list of British marine alge, and although most of them 
nspicuous plants, I venture to think that they are 
idk ‘without interest to algologists. The following list does not 
profess to be complete, but it contains the names of those species 
that fess passed through my hands pte the pie months that 
have just expired. Two of the plants named are new to science, 
and at least three of them =e fob iprng h of ‘reinhi that have 
never before been found in 
1. CuLorocLe@a TUBERCULOSA ansg.) Wille, Algologische ie 
zen, I ivi. in Nyt Magazin for Naturvidenskab, xxxviii. (Kristian 
1900). pete the alge which I obtained from gr mooie of 
the late Mr. Buffham were two specimens of the nt. 
Both were epiphytic on a species of Cladophora éoebbisbty C. utricu- 
losa Kiitz.), on the branches of which they formed minute dingy 
green warts. The microscopic characters and measurements agree 
well with Wille’s figure and description. Mr. Buffham’s specimens 
were obtained at Deal, but I have since found oer plant in more or 
less abundance epiphytic on Rhodochorton Rothii, &c., in caves at 
Berwick-on-Tweed, and at Lulworth Cove.. No doubt the plant is 
a ne but it needs ooking for. 
2. Diplocolon Codii, sp. nov. Plate 475, pi: 3-6. Fronds 
minute, "te seeping the cortical cells of Codium tomentosum, 
broadly claviform, 250-500 » long, 100-150 p a. above, tapering 
doirrtwarts to a width of scarcely #, gelatinous, 
dilated, yellowish-brown above, more or less grum cee Filaments 
8-9 pw thick, repeatedly pseudo-branched, flexuous, curled and twisted 
within the sheath like those of a nostoc. Trichomata 6-8 » wide, 
ot green. Heterocysts subglobose, considerably wider than the 
chomata. 
ie tab. npeeye° between the cortical cells of reuee tomentosum. 
Stackh. Sidmouth, August, 1901, F.4d. B 
In the autumn of 1901, I found i ina rock- pool near the Picket 
Journan or Borany.—Vou, 44: [Jan. 1906.) ~ B 
