198 RESEARCHES ON FUNGI 



to describe and figure (Fig. 101, p. 204) a form which possibly is that 

 which Bolton had found, and which is as similar as may be to Klein's 

 microsporus. The long slender stem, the rounded subsporangial 

 swelling, the minute sporangia, and the want of colour of van 

 Tieghem's species, all point in this direction and agree pretty well 

 with Bolton's figure. But it must be admitted that, since Bolton 

 does not describe the spores, a certain amount of doubt must always 

 attend any identification of his species ; it would, perhaps, be better 

 to quote P. roridus van T. rather than P. roridus (Bolt.). 



In the same memoir (1875) van Tieghem also instituted the new 

 genus Pilaira for the reception of the old Pilobolus anomalus of 

 Cesati, and added a new species Pilaira nigrescens (Fig. 108, p. 218). 

 He also discovered the zygospores of P. anomala (Fig. 107, p. 217). 



In 1876 van Tieghem completed his work by publishing the 

 descriptions of two new species, P. longipes (Fig. 100, p. 203) and 

 P. nanus (Fig. 106, p. 212), while at the same time he pointed out 

 the error which Klein had made and bestowed the nam.e of P. Kleinii 

 on the species with which Klein had worked. He also described 

 the chlamydospores of P. nanus (Fig. 106, p. 212), a mode of repro- 

 duction which had already been signalised by Roze and Cornu (1871) 

 in P. crystallinus. 



Bainier, in 1882, published his " ^fitude sur les Mucorinees," in 

 which he described specimens he had met with of P. longipes, 

 P. oedipus, P. Kleinii, P. roridus, as well as a supposed new species, 

 P. exiguus ; he also confirmed van Tieghem's account of Pilaira 

 nigrescens. 



In 1884 my " Monograph of the Pilobolidae " was published in 

 the Midland Naturalist, Birmingham, in which there was added 

 to the hitherto known species the curious form of Pilobolus Kleinii 

 to which, as already mentioned, the name forma sphaeros2)ora was 

 affixed. A new species of Pilaira was also described, to which the 

 name P. dimidiata (Fig. 109, p. 218) was given on account of its 

 possessing an apophysis nearly as large as its sporangium ; unfor- 

 tunately this has never been met with since, although at the time 

 of publication such a sequel was not imagined possible. 



Dewevre, in 1894, included a good account of the species of 

 Pilobolus in his " Contribution a I'fitude des Mucorinees." He 



