22 
NEW OR CRITICAL BRITISH ALGiE. 
Conchocelis rosea, Batt. Phyc. Mem. Part i. 
Cumbrae. 
One of the perforating algae, resembling Erythrotrichia, but with 
branched fronds. The star-like chromatophores are very char- 
acteristic of the species. 
Wildemania miniata, Foslie Contrib. II., p. 14, f., tenuissima, Foslie. 
Cumbrae. D. Robertson. 
When at Cumbrae Mr. Robertson gave me specimens of this 
plant, which he had gathered in the spring of the year in the 
channel between Cumbrae and Little Cumbrae Except in the 
thickness of the frond, forma typica differs very slightly from this 
variety. 
Antithamnion boxeale, Xjellm. Alg. Arct. Sea,p. 180. 
Lamlash Bay, Cumbrae. 
This species certainly comes very near to A-. plumula, Thur., but 
is a more slender plant, with longer, thinner, less branched fronds, 
and with fewer secund ramuli ; the joints of the main stem, too, are 
longer than in A . plumula. 
Gonimophyllum Buffhami, Batt. Journ. of Bot. 1892. 
Deal. T. Neeve. 
This very interesting plant forms minute leafy tufts on the fronds 
of Nitopliyllum laceratum, Grev. These tufts might be taken for 
abnormal fruit-leaves of the host plant, but they arise from a small 
hemispherical cushion, composed in part of the filamentous basal 
portion of the parasite, and in part of the distorted tissues of the 
host plant. The external portion of the parasite is that in which 
the reproductive organs are produced. Cystocarps, tetraspores, and 
antheridia are much like those of Nitophyllum. 
Rhodochoxton minutum, B, Tee. Atlas, t. 40 {text), Reinbold , Schrift., 
Naturwiss , Verenis Schleswig., Salst., Band ix., 1891. 
Weymouth. Epiphytic on Polysiphonia urceolata , Grev. 
Summer. 
Fronds minute, isolated, or in tufts ; the vertical threads arising 
from branching primary threads, more or less secondly branched, 
the branches again beset with short ramuli, ending in a long- 
colourless hair, tetraspores sessile or shortly stalked, situated on 
the branches either singly or in pairs. Fronds scarcely 1 m.m. in 
height. 
Schmitziella endophlaea. Born, et Batt. Annals of Botany , July . 
1892. 
. Tpraua^ r Apglesea, Puffin Island. On Cladophora pellucida, 
Resembling Melobesia callithamnioides, Falkbg., in the formation 
of the frond ; this minute endophyte, which forms pink stains on 
the stems of Cladophorce, differs from all the other members of the 
■ dZ^ckdfy(i^i)|’oducingits fruit in sori, which are not enclosed 
kdisiinti pencarp. The entire plant grows between the ex- 
^layers of the cell-wall of the host plant. 
