MESOCARPUS. 169 



5. Mesocarpus nummuloides Ilass. 

 Plate XLV. Fig. 1. 



Char. Filaments of rather larger size tlian those of Meso- 

 carpus recurvus. Cells about six times as long as Iroad, 

 not usually recurved. Sporangia circular, and smaller than 

 those of M. recurvus. 

 Sph(27-ocarpus nummuloides Hassall, iu Annals of Nat. Hist, 

 vol.xii. ij. 187. plate 7. fig. 12. 



Hah. Hertford Heath : A. H. H. 



This species approaches very closely to the following. 



6. Mesocarpus parvulus Hass. 

 Plate XLV. Figs. 2, 3. 



Char. Filaments much shorter than those of Mesocarpus 



nummuloides. Cells usualhj six times as long as broad. 



Sporangia circidar, small. 

 Mougeotia parvula Hassall, in Annals of Nat. Hist. vol. xi. 



p. 434. ; SphcBrocarpus parvidus Hassall, Annals, 



vol.xii. p. 187. plate 7. figs. 13, 14. 

 Ilab. Hertford Heath, Epping, &c. ; A. II. H. Near 



Cross in Hand and Waterdown Forest : Mr. Jcnner. 



The larger figure of the two may represent a distinct 

 species. 



7. Mesocarpus ovalis Hass, 

 Plate XLIV. Fig. 2. 



Char. Filaments about equal in size to those of Mesocarpus 

 parvidus. Cells ten or twelve times as long as broad. 

 Sporangia slightly elliptical, their long diameter being 

 placed in the direction of the length of the cells. 

 Sphccj-ocajpus ovalis Hassall, in Annals of Nat. Hist, 

 vol. xii. p. 189. plate 7. fig. 15. 



Hab. Hertford Heath : A.H. H. Penzance : Mr. Balfs. 



