238 



Mycologia 



(Bachman), Ohio (Fink), Missouri (Russell), and New York 

 (Burnham) . 



The writer is under obligations to his former pupil, Miss C 

 Audrey Richards, for the drawings which accompany this paper. 



Miami University, 

 Oxford, Ohio. 



Bibliography 



1. Bachman, Freda M. A new type of spermagonium and reproduction in 



Collema. Ann. Bot. 24: 747-760. pi. 49. 1912. 



2. Bachman, Freda M. The origin and development of the apothecium in Col- 



lema pidposum (Bornh.) Ach. Archiv. Zellforsch. 10: 369-340. pi. 30- 



36. 1913- 



3. Fink, Bruce and Richards, C. Audrey. The Ascomycetes of Ohio. II. The 



Collemaceae. Ohio Biol. Surv. 19 : 35-62. pi. 4-6. 1915. 



Explanation of Plate 13 



Fig. 1. An archicarp of Collemodes Bachmaniamim, the trichogyne of 

 which extended roughly parallel with the surfaces of the thallus. X 580. 



Fig. 2. Several groups of internal spermatia of Collemodes Bachmaniamim, 

 with the hyphae upon which they are borne. X 1,000. 



Fig. 3. A group of four internal spermatia of Collemodes Bachmanianum 

 with the swollen tip of a trichogyne applied to one of them. X 1,000. 



Fig. 4. Two ascogonia of Collemodes Bachmanianum at the right, and 

 two trichogynes extending toward a group of internal spermatia. X 1,000. 



Fig. 5. Portions of three basidia 0/ Collema pulposum with five spermatia 

 attached. X 1,000. 



Fig. 6. An archicarp of Collema pulposum, the trichogyne of which ex- 

 tends above the thallus. X 1,000. 



