GYMNOASCACEAE. 13 



FIGURES ILLUSTRATING THE GYMNOASCACEAE, &c. 



Fig. 1, Keitliia tetraspora, Sacc., fungus seen from above, after dehiscence ; 

 slightly x ; Fig. 2, ascus and paraphysis of same, highly x ; Fig. 3, 

 free spores of same; X 300; Fig. 4, two plants of same on leaf of 

 juniper; nat. size; Fig. 5, Ascomyces aurea, Fries, showing a blister 

 formed by the fungus on leaf of black poplar ; nat. size ; Fig. 6, section 

 through one of the blisters, showing the asci of the Ascomyces, each with 

 its basal cell, passing between the epidermal cells, a, of the host ; highly x ; 

 Fig. 7, free spores of same ; one is producing elliptical secondary spores 

 by gemmation ; x 300 ; Fig. 8, Ascomyces deformans, Fckl., section 

 through portion of a blister on a peach leaf, formed by the fungus, show- 

 ing the asci originating from a hypha running between the epidermis 

 and the cuticle ; a portion of the vegetative hyphse of the fungus is seen 

 running between the cells of the host ; highly x ; Fig. 9, free spores of 

 same ; X 300 ; Fig. 10, Coccomyces striatus, Phil, and Plow., fungus 

 seen from above, after dehiscence; slightly x ; Fig. 11, the same on a 

 fragment of dead bramble stem : uat. size ; Fig. 12, ascus and paraphyses 

 of same; highly x ; Fig. 13, free spores of same; x 300; Fig. 14, 

 Celidium various, Arnold, several specimens growing as a parasite on the 

 thallus of the lichen Lecanora glaucoma; nat. size; Fig. 15, section 

 through ascophore of same; slightly x ; Fig. 16, ascus and paraphyses 

 of same ; highly x ; Fig. 17, free spores of same ; x 300 ; Fig. 18, 

 Abrofhallus parmeliarium, Arn., ascophore viewed from above, parasitic 

 on the thallus of the lichen Parmelia saxatilis; slightly x ; Fig. 19, 

 ascus and very much branched paraphyses of same ; highly x ; Fig. 20, 

 free spores of same ; x 300 ; Fig. 21, Fhacidium infestans, Karsten, free 

 spores ; x 300 ; Fig. 22, Slictis radiata, Pers., several specimens ; nat. 

 size ; Fig. 23, one specimen of same ; rather highly X ; Fig. 24, ascus 

 and paraphyses of same; highly x : Fig. 25, spore of same; x 300; 

 Fig. 26, spore of same; X 750; Fig. 27, Nemacyclus niceus, Sacc., 

 specimens on leaves of the Scotch fir; nat. size; Fig. 28, on specimen of 

 same : slightly X ; Fig. 29, ascus and paraphyses of same ; highly x ; 

 Fig. 30, free spores of same ; X 300 ; Fig. 31, Melittosporium pteridinum, 

 Sacc., ascus and paraphyses ; highly x ; Fig. 32, spore of same ; x 300 ; 

 Fig. 33, Melittosporium lichenicolum, Mass., ascus and paraphyses ; X 300 ; 

 Fig. 34, Agyrium rufum, Fries, plants; slightly x ; Fig. 35, ascus 

 and paraphyses of same; X 300; Fig. 36, Laquearia sphaeralis, Fr., 

 plants ; nat. size ; Fig. 37, section of an ascophore : slightly x ; Fig. 38, 

 ascus and paraphyses of same ; x 300 ; Fig. 39, Trochila craterium, Fr., 

 portion of an ivy leaf with specimens : nat, size ; Fig. 40, ascus and 

 paraphyses; x 300; Fig. 41, a single plant of same after dehiscence f 

 slightly x ; Fig. 42, Trochila ilicis, Crouan, portion of holly leaf with 

 specimens ; nat. size ; Fig. 43, ascus and paraphysis ; x 300 ; Fig. 44, 

 section through ascophore of same; slightly x ; Fig. 45, Gymnoascus 

 Eeesii, Baran., portion of a fertile hypha bearing asci ; x 300 ; Fig. 46, 

 Ascodesmis nigricans, Van Tieghem, portion of a tuft of asci and 

 paraphyses ; X 300 ; Fig. 47, Heterosphaeria patella, Grev., plants on a 

 <leacl stem of umbellifer ; nat. size ; Fig. 48, section of ascophore before 



