168 CONJUGATE^E. 



greater size of the sporangia ; but these are, I thhik, of a 

 sufficiently well marked character to justify its being ranked 

 as a distinct species. It has only as yet been found by that 

 indefatigable observer Mr. Jenner. 



3. Mesocarpus eecurvus Hass. 



Plate XLIII. Fig. 2. 



Char. Filaments smaller than those of 31. intricatus. Cells 

 six or seven times as long as broad. Sporangia circular. 



SphcB?^ocaj'pus recurvus Hassall, in Annals of Nat. Hist. 

 voL xii. -p. 186. plate 7. fig. 10. 



Hab. Penzance : M7\ Ralfs. Rackham Common : Mr. 

 Jenner. 



" This species I first received from Mr. Palfs, and some 

 two or three weeks afterwards it was sent me by Mr. Jenner. 

 I regard, it however, as the species figured by Dillwyn (Sup- 

 plement, plate C), as M. genujlexa in a state of repro- 

 duction." — Annals. 



4. Mesocarpus depressus Hass. 



Plate XLIV. Fig. 1. 



Char. Filaments rather larger than those of Mesocarjnis 

 recurvus. Cells six or seven times as long as broad. 

 Sporangia oval, small, their long diameter being placed in 

 the direction of the length of the cells. 



Sphcerocarjms depressus Hassall, in Annals of Nat. Hist, 

 voh xii. p. 186. plate 7. fig. 11. 



Hab. In a boggy spot near Cross in Hand, opposite to 

 where the road branches to Hailsham : Mr. Jenner. 

 Penzance : Mr. Ralfs. 



" There can be no doubt of the distinctness of this species, 

 which was procured by Mr. Jenner, some weeks before it 

 was found and transmitted me l)y Mr. Ralfs." — Annals. 



