170 CONJUGATEiE. 



" The sporangia, though elliptical, are not nearly so much 

 so as those of 31. depi-essus, and the filaments not one half 

 so large." — A^inals. 



8. Mesocarpus angustus Hass. 



Plate XLY. Fig. 4. 

 Char. Filaments very slender. Cells many times longer than 

 broad. Sporangia circular, very large in comparison with 

 the size of the filaments. 

 Sph(Brocarpus angustus Hassall, in Annals of Nat. Hist. 



voLxii. p. 187. plate 7. fig. 16. 

 Hah. Penzance : JSIr. Ralfs. 



" This is a very distinct species, and for its discovery we 

 are indebted to Mr. Ralfs." — Annals. 



Sporangia formed tvithout union of the filaments, or com- 

 mingling of the contents of two cells. 



9. Mesocarpus notabilis Hass. 



Plate XL VI. Fig. 2. 



Char. Filaments at first cylindrical, hut subsequently be- 

 coming angulated, the angle of fiexion being situated in 

 the centre of each cell. Cells usually about eight or ten 

 times as long as broad, but frequently longer. Sporangia 

 non-symmetrical, a single one being placed in the angle 

 formed in each of the cells. 

 Mougeotia notahilis Hassall, in Ann. Nat. H. vol. x. p. 46. 



Hah. Found in great abundance in some brick-fields near 

 Netting Hill : A. H. H. 



I am unwilling to create a new genus for the reception of 

 this curious and anomalous production, and am induced to 

 refer it to Mesocarpus, on the supposition that were the fila- 

 ments in any case to conjoin, and sporangia to be formed, 

 that these would present the characters of the genus, and be 

 either spherical or oval. 



