152 



MYCOLOGY 



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Fig. 52. — A, Tuher ceslivum frtiit-body; B, Tuber magnatiim fruit-body; C , Tuber 

 brumale f. melanosporum, section through fruit-body; D, Tuber excavalum, section of 

 fruit-body; E, Tuber ceslivum f. mese7!tericuni, piece of fruit-body near pcridium en- 

 larged; G, piece of Tuber excavation enlarged;. H, Tuber rufum, fruit-body magnified 

 showing asci and ascospores; J, Tiihrr lirumalc, ascia with spores; K, Tuber magnalum, 

 ascus with spores. {See Die natiirlidicu Fjhnizenfamilien I. i, p. 287.) 



