STRUCTURE.] FUNGALS. 121 



11. Nucleus, is the central part of a perithecium. 



12. Sporangium, is the external case of Lycoperdon and its 

 allies ; it is, however, best employed to designate the false 

 peridium of Mucorini. 



13. Sporangiolum, its diminutive. 



14. Peridium, Peridiolum, terms usually substituted for Spo- 

 rangium and Sporangiolum. 



15. Perithecium, is a term used to express the part which 



contains the reproductive organs of Sphseria and its 

 co-ordinates. 



16. Ostiolum, is the orifice of the perithecium of Spha3ria. 



17. Spherula, is a globose peridium, with a central opening 

 through which sporidia are emitted, mixed with a gela- 

 tinous pulp. 



18. Capillitium, is a kind of purse or net, in which the spores 

 of some Fungi are retained ; as in Trichia. W. 



19. Trichidium, or Pecten, is a tender, simple, or sometimes 

 branched hair, which supports the spores of some 

 Fungi; as Geastrum. W. 



20. Asci, are the tubes in which the sporidia are placed; 



ascelli or theca are the same thing. 



21. Paraphyses, barren asci, or at least threads accompanying 



the asci. 



22. Spores ; the reproductive organs when produced at the 

 tip of a cell, without any external case or ascus. 



23. Sporidia ; spores contained in asci. Sporidiola ; the nuclei 



of spores or sporidia. 



24. Episporium; the membrane, usually double, which in vests 



the Endochrome of the reproductive organs. 



25. Endochrome; the granular contents of spores and spo- 

 ridia. 



26. Nuclei; bodies contained in the reproductive organs 



analogous to cytoblasts, and then called sporidiola, or 

 mere oil globules. 



27. Sporules ; a term used variously by authors, but which 

 is best confined to designate the component granules of 

 the Endochrome. 



28. Thallus, or TTialamus, is the bed of fibres from which 

 many Fungi arise. 



