76 THE LARCH CANKER 



these were consequently regarded as one species by earlier 

 investigators. For clearness we will at present adopt the 

 names given by Massee (1895) for four of these. They are : 



1. Dasyscypha calycina, Fuck. 



Spores 18-25 X 6-8 p.. 

 On larch and Scots pine. 



2. D. subtilisima, Sacc. 



Spores 8-10 X 2 p. 

 On firs (larch, silver fir, and spruce V). 



3. D. abietis, Sacc. 



Spores 12-14X3/*. 

 Paraphyses longer than the asci. 

 On silver fir. 



4. D. resinaria, Rehm. 



Spores 3xr5-2ju. 



On spruce, pine, larch, and Pinus excelsa. (Massee, 

 1902.) 



Though there is to-day a considerable difference of opinion 

 as to the value of all these species, they will serve for pur- 

 poses of argument. 



Types which might include any or all of these were 

 described by 



1. Batsch (1786), p. 195. Description and figures of 

 a species not more than 1 mm. across, and rather longer 

 than broad, under the name of Elvella calyciformis. The 

 under -side of this fungus was grey-brown or flesh-coloured, 

 so that Batsch was probably not describing the fungus 

 which causes canker. 



2. Hedwig (1789), ii, p. 64, Tab. xxii, described the same 

 form under the name of Peziza calyciformis or Octospora 

 calyciformis. He was the first to find the eight spores in 

 the ascus. 



3. Willdenow (1787), p. 404, gave a similar account of 

 the fungus. 



4. Schumacher (1803) first adopted the name Peziza 

 calycina. He found his specimens ' in strobylo Pini abietis ', 



