94 
NEW BRITISH MARINE ALGJS. 
transverse bands.” No mention is made of this grouping of the 
spores in the description of the plant given by Kiitzing. 
Harvey mentions the plant in “ Phycologia Britannica,” but “ from 
an unwillingness to multiply doubtful species ” omits all mention 
of it in his “ Synopsis ” and subsequent works on British Algology. 
Prof. Kjellman in his “ Algae of the Arctic Sea ” makes it a variety 
of D. hippuroides , but whether or not the Arctic plant is really the 
same as the Irish one I am unable to say. E. A. B. 
Grdnlands Havalger. Af L. Kolderup Rosenvinge (Ssertryk af 
Meddelelser om Gronland, iii., pp. 765-981). 
This paper is an important contribution to our knowledge of 
Arctic Algae and will prove of exceptional interest to British 
Algologists, as many new species and forms likely to occur on the 
coast of Britain are described in it. The northern seas are rich in 
species of Lithothamnia and Lithophylla, and therefore one is not 
surprised to find two new species of the former genus described in 
Herr Rosenvinge’s paper. The first of these species, L. flabellatum , 
consists of a bright rose-coloured expansion, closely adherent to its 
substratum, from the surface of which flabellately-branched, com- 
pressed, or cylindrical branches arise. The conceptacles are slightly 
raised, and the spores two- parted. The other species, L. tenue , 
appears to outwardly resemble Lithophyllum Lenoimandi ; figures 
of both species are given. Prof. F. Schmitz gives the description 
of two new plants belonging to the Squamariacece. The first of 
these, Peyssonellia Rosenvingii , Schmitz, somewhat resembles 
Cruoriella Dubyi , Schmitz = Peyssonellia Dubyi , Crn., in appear- 
ance, differing from it chiefly in its marginal growth, the rows of 
cells of the decumbent stratum regularly radiating from a point, 
while in Cr. Pubyi the decumbent stratum is formed by the union 
of numerous lobes, the cell rows of which are arranged flabellately. 
From Peyss. rupestris, Crn., Peyss. Harveyana, Crn., and P. 
atropurpurea, Crn., it differs by having thicker, sborter-jointed 
erect filaments, and a softer substance. The other plant, Ci'uoria 
arctica, Schmitz, forms a connecting link between the genera 
Cruoria and Hcematophlcea , having sporangia like the former and 
structure and consistence like the latter, but differing from both by 
possessing numerous glandular cells. Herr Rosenvinge is of 
opinion that only one species (A. plumula, Thur.) of the genus 
Antithamnion is found on the coast of Greenland, and to this 
species he refers as mere varieties A. boreale , Kjellm., A. Pylaiscei, 
Kjellm., and A. Jloccosum, Kjellm. Prof. F. Schmitz furnishes 
notes on the new genus Turner ella, Schmitz (founded on Iridcea 
M ertensiana, Post, et Rupr.), to which he refers Kallymenia 
Pennyi, Harv., K. rosacea, J. A g., and A. septemtrionalis , Kjellm., 
and on a new species, C. sanguinea, Schmitz, of Gallymenia. 
By dividing the Rhodophycece into two sections — Floridece and 
Baugioidece — Herr Rosenvinge has avoided placing the genera 
Porphyra and Bangia in the Floridece without at the same time 
