2l8 



RESEARCHES ON FUNGI 



The zygospores were found by Brefeld on horse dung which had 

 borne luxuriant crops of fruit bodies (c/. Fig. 107, H-J). 

 Illustration : Fig. 107. 



Pilaira nigrescens van Tiegh. in 



vol. i 



Ann. Sci. Nat. ser. 6, 

 p. 60, pi. 1, f. 25-8 (1875). 

 Grove, Pilobolidae, p. 337. Sacc. 

 Syll. vii. 189. 



Sporangiophore shorter than in 

 the preceding species (1-5-2 cm.) 

 and more slender. Sporangium 

 also smaller, but having a simi- 

 lar granular apophysis ; columella 

 blackish-violaceous or bluish, 

 hemispherical, and ending in a 

 conical papilla. Spores globose, 

 colourless, 5-6 (x in diameter. 



On dung of rabbit. France ; 

 Distinguished by its size, its spores, and its conical and 



Fig. 108. — Pilaira nigrescens v. Tiegh. 



A, four fruit-bodies, collapsing. 



B, upper part of a fruit-body 

 after dehiscence of the sporangiiun ; 

 TO, protruding mucilage. C, upper 

 part of a fruit-body after the fall 

 of the sporangium. D, spores. 

 Copied by A. H. R. Buller from 

 van Tieghem's Nouvelles Re- 

 cherches. Magnification : A, 

 natural size; BandC, 90; D, 380. 



rare 



coloured columella. 

 Illustration : Fig 



108. 



3. Pilaira dimidiata Grove, in Journ. Bot. vol. xxii, p. 132, 

 pi. 245, f. 7 a-d (1884) ; Pilobolidae, p. 338, pi. 6, f. 10 a-c. Sacc. 

 Syll. vii. 189. 



Sporangiophore slender, cylindrical, and while erect not more 

 than -5-1 -0 mm. high, then bending down towards the substratum 

 and becoming 3-4 mm. long. Sporangium ^„^ 



at first yellow, then black, hemispherical, \y 



100-120 (J, diam. ; immediately beneath it 

 the sporangiophore is widened somewhat 



Fig. 109.- — Pilaira dimidiata Growe. A, mature fruit- 

 body. B, columella. C, spores. DrawTi by 



A. H. R. Buller from sketches made by W. B. Grove 

 in 1883 without the use of a camera lucida. 

 Cf. Plate 245, Fig. 7, a-d, in Grove's New or 

 Noteworthy Fungi, \%%^. Magnification: A, 116; 



B, 240 ; C, 660. 





