NEW OR CRITICAL BRITISH ALGA5. 
55 
sporangia ( Gametangia ), whether surrounding the branches 
(Zosterocarpos, Born.) or not ; from the nature of the attachment 
whether effected by means of creeping filaments or an expanded 
disc, and whether the plantis a parasite ( i.e ., with filaments enter- 
ing the substance of the host plant) or an epiphytic. Prof. Kjell- 
man differs from Farlow, Reinke, Kuckuck, and others in retaining 
as distinct genera Kctocarpus , Lyngb., Pylaiella , Bory, and 
Streblonema , Derbes. He also is of opinion that Magnus' genus 
Ascocyclus is generically distinct from Stromfelt's Phycocelis. 
Three genera only, Pleurocladia , A. Braun, Choristocarpus , 
Zan., and Disco sporangium, Falkbg., are included in the Choristo- 
carpacce. 
Note on the genera Entonema, Reinsch , and Streblonemopsis, 
Valiante ( Berichte der deutscher botanischer Gesellschaft, ix., 
No. 5, p. 129-130, 1891.) 
M. De Toni is of opinion, since Entonema penetrans , the type 
species of Reinsch’s genus Entonema , a group undoubtedly con- 
taining plants belonging to more than one genus, is too closely 
related to Streblonemopsis irritans , Val. (1883), to be generically 
separated from it, that the latter genus must be united to 
Entonema (1875), a name having the priority of publication by 
some years. 
Parasitic Phceosporece. (Journ. de Bot., Morot, vi., 1892, pp. 
1-10, 36-44, 55-59, 76-80, 90-96, 97-106, 124-131. Four 
Plates.) 
M. Sauvageau in this important paper calls attention to the fact 
that many of the smaller Phceosporece are true parasites, and not, as 
has too often been assumed, mere epiphytes. In the genus 
Elachista , E. stellulata , Griff., E. Areschougii , Crn., and E. 
clandestina , On., send endophytic filaments into the substance of 
the host-plant. The last named species, according to the author, 
appears to belong not to this genus, but rather to Kctocarpus , 
since it has no distinct basal layer. The author recalls attention 
to the fact that the following previously described Ectocarpi are 
also parasites, E. investiens , Hauck. ; E. ? velutinus, Kiitz. ; and 
E. fasciculatus, Harv., while he describes six species which are 
either entirely new or have never been described. Of these new 
species E . minimus , Nag. ; E. brevis , Sauv. ; and E. parasiticus , 
Sauv., have already been mentioned in this journal as occurring 
on the coasts of Britain ; it is, therefore, only necessary to mention 
the characteristics by which the remaining three species may be 
known. 
E. valiantii , Born, in Herb. — This species is found on Cystoseira 
ericoides , its filaments penetrating the substance of the host 
plant to the depth of two or three cells, causing the formation 
of a gall-like growth ; endophytic threads composed of cylindrical, 
straight, or curved cells, 8-10 p thick and from 1-4 times longer 
than broad, enlarged at the extremities or more or less torulose 
and irregular, branched in the gall in a corymbose manner. 
