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CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XLIV. 



Fig. 18. Stephensia boinbycina Tul. 



(a) Fragment of gleba with asci. (b) Isolated spore showing 

 its rugosities, (c) Optical section showing the periphery. 



Fig. 19. Hydnotrya cerebriforniis, sp. nov. 



(a) Vertical section of fungus, (b) Enlarged vein-tracing, (c) 

 Asci with paraphyses. (d) Isolated spore showing roughened 

 surface, (e) Optical section of spore. ( f ) Section of the sur- 

 face of spore magnified. 



Fig. 20. Piersonia alveolata, gen. et sp. nov. 



(a) Section of gleba showing veins, cell, and asci. (b) Asci 

 (magnified) with spores, (c) Isolated spore, (d) Optical sec- 

 tion of spore, (e) Section of spore showing alveolate surface. 



Fig. 21. Pierso7iia scabrosa, sp. nov. 



(a) Section of plant, (b) Enlarged section of cut surface, 

 (c) Ascus with spores, (d) Optical section of spore, (e) Sec- 

 tion of spore surface. 



Fig. 22. Endogone nialleola, sp. nov. 



(a) Transverse section of fungus, full size of the mature plant. 



(b) Conceptacle with contents and fragment of pedicel. 

 Fig. 23. Terfeziopsis lignaria, gen. et sp. nov. 



(a) Ascus with spores (spores round or slightly ovoid), (b) 

 Optical section of spore (about 70 to 75 spines in its circumfer- 

 ence), (c) Hooked spines on surface of spore. 



