2o6 RESEARCHES ON FUNGI 



On all kinds of dung. Very common. Europe, E. Africa, 

 Canada, U.S.A., etc. 



This appears to be the commonest species in Europe, and 

 perhaps in most countries where Pilobolus occurs. It has often 

 been confounded with P. crystallinus, but is not so high, is more 

 tinged with yellow, the thickened band of protoplasm at the top of 

 the stipe is more brightly orange, and its spores, although of the same 

 shape, are perceptibly larger. Trophocysts usually with a single 

 apophysis, rarely with two. 



Illustration : Fig. 99, A. Other illustrations in this volume : 

 Figs. 2, 12, 13, 22, 27, 28, 29, 32, 39, 42, 46, 61, 62, 83, 86, 91, 94, 

 and 95. 



5. Pilobolus sphaerosporus Palla, Zur Kenntniss der Pilobolns- 

 Arten, in Oesterr. Bot. Zeitschr. vol. 50, p. 400, pi. 10 (1900). 



Pilobolus lentiger Corda, Icon. Fung. vol. i, p. 22, pi. 6, f. 286 

 (1837), including var. macwsporus Berl. & de Toni, in Sacc. Syll. 

 vii. 188 (1888). 



Pycnofodium lentigerum Corda, ibid. vol. v, p. 18 (1842), an 

 ill-nourished form. 



Pilobolus crystallinus Bonord. Handb. p. 128, pi. 10, f. 203 (1851). 



P. oedipus, var. iritermedia, Coemans, Spic. Mycol. in Bull. 

 Acad. Belg. ser. 2, vol. xvi, p. 71 (1863). 



P. crystallinus (P. oedipus, forms b and c) Klein, Zur Kenntniss 

 des PiloboL, p. 360, pi. 26, f. 40 b, 46-8 ; pi. 27, f. 49, 50 (1872). 



P. intermedius (Coem.) Karst. Myc. Fenn. part 4, p. 71 (1879). 



P. oedipus Brefeld, Botan. Untersuch. part 4, p. 69, pi. 3, f. 1-10 ; 

 pi. 4, f. 11-14 (1881). 



P. exiguus Bainier, Etude, p. 47, pi. 2, f. 17 (1882). 



P. Kleinii, forma spluierospora, Grove, in Journ. Bot., vol. xxii, 

 p. 132, pi. 245, f. 5 (1884) ; Pilobolidae, p. 335, pi. 4, f. 9. 



Similar to P. Kleinii, but usually smaller. Spores yellow or 

 orange, more or less globose, 10-20 u. in diam., varying greatly in 

 size, often with granular contents, diffusing very easily in water, 

 and having a thin wall composed of only one coat. 



On dung of man, horse, cow, etc. Europe. 



The spores vary considerably in size. I have always found this 

 in company with P. Kleinii at the beginning of its growth in a 

 culture, but changing and passing gradually into the normal form. 



