STAUROCARPUS. 177 



while from the genus Mesocarpus, hereafter to be described, 

 it is separated by the form of the sporangium. 



But one species of this genus is described by British writers. 

 In a recent number of the " Annals " two others were added, 

 and I have now the pleasure of describing three other species. 



> 



1. STAUROCAKPUS GLUTINOSUS Hass. 

 Plate XLVII. Fig. 1. 



Char. Filaments of considerable diameter, highly mucous, 

 bluish green. Cells six or seven times as long as broad, 

 those being the longest which have conjugated. Sporidium 

 quadrangular, formed entirely by the transverse tubes. 

 Sporangia, when perfect, somewhat oval* 



Mougeotia glutinosa, Hassall, in Annals of Nat. Hist. vol. 

 xxii. pi. 7. fig. 1. 



Hob. Hertford Heath : A. H. H. 



This is a very distinct and fine species, occurring abundantly 

 in boggy pools on Hertford Heath. Not unfrequently a 

 number of contiguous pairs of cells unite, forming arched 

 loops or links, separated from each other by the square 

 ovarium, which is the chief characteristic of the species. 



2. STAUROCARPUS CCERULESCENS Hass. 

 Plate XLVII. Fig. 2. 



Char. Filaments of less diameter than those of Staurocarpus 

 glutinosus. Cells usually eight or ten times as long as 

 broad. Endochrome, when recent, ccerulescent ; when dried, 

 of a purple hue. Sporangia cruciform, large, and filled 

 with zoospores of a greenish colour. 



Staurocarpus capucinus Hassall, in Annals of Nat. Hist, 

 vol. xii. p. 184. 



Hob. Henfield : Mr. Borrer. Tunbridge Wells : Mr. 

 Jenner. Penzance : Mr. Rolfs. High Beech, Essex : 

 A. H. H. 



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