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or PILOBOLTJS. 



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There is one other fact which may be mentioned before I conclude, 

 VIZ. the occasional appearance in the interior of the vesicle of 



like a 



young 



10) 



, sometimes 

 ink. that tf 





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runture 



sporangium. When the septum is accidentally broken through, 

 the whole mass of spores may be seen to rush into the vesicle, and 

 the fracture, if very slierht, misrht permit the escane of these small 



sufficient to allow 



fully-formed 



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. -Postscript. — ^I was not aware, until after this paper was finished, 

 that the question of the specific difierence between Piloholus 

 cfystallinus and iPiloholus roridus has been lately discussed by 

 Ijail, His observations are to be found in the * Botanische 

 Zeitung,' 7th Sept. 1855. 



^> 



X. 



Description or Plate II. 



The Piloholus in an early stage, before the formation of the head^ 

 magnified. , . ^ .. „. .?. 



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-*'»y- 2. Hie Piloholus when it has assumed the pin-shape, slightlj vouigtn&edu 

 ^^' 3. A perfect plant magnified about 20 diameters. , ,. , , 



,*V. 4. The lower portion of a plant in which the swelling at the lower encl of 



the stem-cell is less oblique than in figs. 3 & 5. 



■^- 5. A perfect plant magnified 44 diameters, showing the adherent dew-drops. 



^£^' 6. The root-cell and a portion of the stem-cell of another plant, magnified 



44 diameters. 



^^S^' 7. The upper porfion of a plant magnified GO diameters. This specimen 



shows the peeling ofiP, or imperfect development, of the veil, and the 

 band of orange-coloured matter at the jmiction of the stem and vesicle, 

 referred to in the text. 



^^' 8. A portion of the vesicle of a plant which has cast its sporangium, show- 

 ing the eversiori of the septum. 



■%• 9. Spores magnified nearly 400 diameters. The one with a double outline 



has been treated with alcohol. 



'V' 10. Cjlindrical and dumb-bell-shaped bodies occasionally seen in the in- 

 terior of the vesicle. 



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