138 



Mycologia 



Specimens examined: Pennsylvania, Sumstine; New York, 

 Sums tine. 



Illustrations: Van Tieghem, /. c. pi lo, f. 10-13; Bref. 

 /. c. pi. 4, f. 17; Bainier, fitude, pi. 2, f. 11-12. 



4. Hydrogera Oedipus (Mont.) O. Ktmtze, /. c. 1891 

 Pilobolus Oedipus Mont. Mem. Soc. Linn, de Lyons i. 1826. 



(The original description was not seen by me.) 



This species may be known by the rather short sporangiophores 

 and the globose spores of unequal size. 



Substrata : On dung of horse. 



Specimens examined: The following collections are in the 

 Herbarium of the New York Botanical Garden but only the 

 ejected sporangia caught on paper and on leaves are found in 

 the packets and therefore the determinations were made from 

 spore characters only. 



Canada, Ellis; Kansas, Kellerman; Louisiana, Langlois; Ne- 

 braska, Williams; Pennsylvania, Meehan, Rothrock, Scribner. 



Illustrations : Bainier, fitude, pi. 2, f. i-io. 



Species Reported 

 Hydrogera rorida O. Kuntze, /. c. 1891. Mucor roridus Bolt. 

 Hist. Fung. 3 : 168. 1789. Pilobolus roridus Pers. Syn. Fung. 

 117. 1801. 



This species is reported by Pound in Minn. Bot. Studies i : 

 loi. 1894. 



7. PiLAiRA Van Tieghem, Ann. Sci. Nat. VL i : 

 51- 1875 



Original description : Les deux caracteres que nous venons 

 d'assigner au genre Pilobolus, a savoir la dehiscence speciale du 

 sporange, determinee par la structure meme de cet organe, et sa 

 projection, liee au contraire a la forme et a la structure du fila- 

 ment qui le porte, sont, avons-nous dit, independants I'un de 

 I'autre. On concoit done que le premier puisse exister sans le 

 second, et c'est precisement ce qui a lieu dans le genre nouveaii 

 que nous allons etudier maintenant. Le sporange y possede la 

 meme structure, et par consequent le meme mode de dehiscen- 



