807 
ON THE PILOBOLIDiE. 
With reference especially to the Midland district, I may 
mention that Purton, in his record of P. urceolatus 1 , which 
judging from his figure is probably the true crystallinus , 
relates that he found with it some specimens according more 
or less with the description of Mucor roridus, as other authors 
have done. He, therefore, inclined to the opinion that the 
latter is only a variety of the former, in which he is supported 
by Greville 2 and Loudon 3 . Relhan, on the contrary, 
maintains them as distinct 4 , and from his remarks under 
Id. roridus —“ Capitulo spliaerico. Stipes semuncialis, pellu- 
cidus, roridus”—seems to have met with a form more closely 
resembling Bolton’s figure than any authors of later date 
have been successful in doing. I regret much that I have been 
unable myself to meet with P. roridus , which I believe is 
much rarer than is usually imagined. In the neighbourhood 
of Birmingham only P. crystallinus, P. Kleinii, and P. cedipus 
have hitherto occurred. 
PART V.—SYSTEMATIC. 
Order, MUCORINI, De Bary. 
Family, Pilobolidte, Van Tiegliem. 
Genus I. — Pilobolus, Tode. 
1. Pilobolus oedipus, Montague. 
2. 
- exiguus, Baimer. 
3. 
- crystallinus, Tode. 
4. 
- Kleinii, Van Tieghem. 
o • 
- longipes, Van Tiegliem. 
6. - 
-- roridus, Persoon. 
7. 
- nanus, Van Tieghem. 
Genus II.— Pilaiiu, Van Tiegliem. 
1. Pilaira Cesatii, Van Tiegliem. 
2. -- nigrescens, Van Tieghem. 
3. - dimidiata, mihi. 
1 Midland Flora, iii., 325, pi. 31. 
2 Flora Edin., p. 418. 
3 Enycl. PL, p. 1024, fig. 16349. 
4 Flora Cantab., ed. iii., p. 579. 
