OF CEBTACEOIJS PLANTS. 269 



of perithecium, without development of stroma ; paraphyses 

 present." 



Host. — Shoot of Cnjptomeriopsis. 



Horizon. — Upper Cretaceous. 



Locality. — Hokkaido, Japan. 



Type. — In Prof. Fujii's collection in the Botanical Department, 

 Science College, Imperial Universitj', Tokio, Japan. 



This fungus is found excellently preserved, infecting most of 

 the shoots and leaves of the Cretaceous Gymnosperm Orypto- 

 meriopsis. The fructifications form under the hypoderm of the 

 leaves, as is illustrated in the text-fig. 21. 



The prevalence of this fungus in the remains of Ori/pto- 

 meriopsis is commented on by Fujii (1910), who compares it 

 with those infesting the living genus Cryptomeria, and con- 

 siders that it may have been one of the factors in the extinction 

 of the host. 



v. 11988. A microscopic section of three leaves of Crypto- 

 meriopsis autiqua, Stopes & I'lijii, all affected by 

 a fungus which is in all probability the same as 

 that described by Suzuki as Pleosporites Shirainus 

 infecting Crypiomerinpsis mesozoica, Suzuki. One of 

 the fungal perithecia is cut nearly medianly in this 

 section, and two other perithecia in Ihe other leaves 

 are cut very tangentially. Throughout the meso- 

 phyll of all the leaves there are numerous ramifying 

 hyphae which show their septations in many places. 

 In their description of the host-'pla.nt, Cryptomeriopsis 

 antiqua, Stopes & Fujii (1910, p. 55) noted the 

 presence of this fungus but did not describe it further. 

 It is of course possible that it is not of the same 

 species as that more recently described by Suzuki 

 (1910) on his species of Cryptomeriupsis; inde^'d, 

 judging from the " biological species " of fungi which 

 result from their adaptations to different hosts, it is 

 more than likely that the two fungi would be classed 

 as different species were they both alive. In the 

 present imperfect state of our knowledge, however, it 

 seems better to place this fungus in Suzuki's species, 

 Pleosporiies Shirainus, with a note to the effect that 



