1916] Gilkcy: A Revision of tJie Tuherales of California 331 



"Under shrubs in firm ground, Auburn, Placer Co., Calif., Nov. to 

 Apr." No. 216, Hk. Col. Type oi Pscudhydnotrija nigra. 



"Under 3-8 inches of decaying pine needles, over sand, Golden Gate 

 Park, San Francisco, Calif., Dec. 22, 1901." 



No. 3, U. C. Col. W. A. Setchell and C. C. Dobie. 

 "Under Pinus mdiafa, U. C. Campus, Berkelev, Calif., Jan. 3. 1903." 



No. 42, U. C. Col. N. L. Gardner. 

 "Under Pinus radiata, U. C. Campus, Berkeley, Calif., Jan. 3, 1903." 



No. 43, U. C. Col. N. L. Gardner. 

 "Under Pinus radiata, U. C. Campus, Berkelev, Calif., Jan. 3, 1903." 



No. 44, U. C. Col. N. L. Gardner. 



"Under pines. Golden Gate Park, San Francisco, Calif., Dec. 24, 



1902." No. 52, U. C. Col. N.L.Gardner. 



"Under needles of Pinus radiata on top of ground, U. C. Campus, 



Berkelev, Calif., Feb. 25, 1903." 



No. 80, U. C. Col. N. L. Gardner. 



"Under Pinus Pinaster, Golden Gate Park, San Francisco, Calif., May 



9,1903." No. 142, U. C. Col. N.L.Gardner. 



"Under Pinus Pinaster, Golden Gate Park, San Francisco, Calif., Nov. 



6,1903."' No. 153, U. C. Col. N.L.Gardner. 



"Under Pinus Pinaster, Golden Gate Park, San Francisco, Calif., Nov. 



6,1903." No. 154, U. C. Col. N.L.Gardner. 



"In sand under Pinus Pinaster, Golden Gate Park, San Francisco, 



Calif., Oct. 15, 1904." No. 206, U. C. Col. N.L.Gardner. 



"Under pines, Ligleside, San Francisco Co., Calif., Oct. 29, 1904." 



No. 207, U. C. Col. N. L. Gardner. 

 "Ingleside, San Francisco Co., Calif., Feb. 13, 1915." 



No. 414, U. C. Col. N. L. Gardner. 



This seems to be the most common representative of the Tuberales 

 about the San Francisco Bay region, and the comparative abundance 

 in which material has been collected has made possible definite observa- 

 tions in regard to the constancy of its characters. The ascoearp is 

 found to vary greatly in form, from almost even with a comparatively 

 simple, closed, inner cavity somewhat similar to that of Peziza or 

 Hydnocystis, to distinctly folded with the cavity apparently very com- 

 plexly divided. The apparent partitions are discovered to be infold- 

 ings of the outer wall or projections from the inner wall, generally 

 very irregularly lobed and often fitted closely together. They are 

 rarely united at points, l)ut usually are very easily separable; and the 

 cavity is found to be composed of labyi'inthine canals which, except 

 rarely near the cortex, are all connected. All stages are found between 

 the ascocarps with nearly simple cavities and those with the central 

 hollow represented by labyi'iiitliiiie canals. In some cases, one side of 

 the ascoearp is simply infolded, tlic two walls of the fold not in con- 

 tact ; in others there niav ))e sevei-al infoldings which become closer as 



