May 1905 ] Index to North American Mycology 145 
Sr mba cedron, host to Phyllachora simbae cedronis P. Henn. 
n. sp. Hedwigia, 43:147. 16 May, 1904. 
Smith, Theobald. Some Problems in the Life History of Path¬ 
ogenic Organisms. Address, Sect. Bacteriology, Internat. 
Cong, of Arts and Science. St. Louis, Mo., Sept. 24, 1904.] 
Science, N. S. 20:817-832. 16 Dec. 1904. 
Soil Bacteria, related to Bacillus subtilus, see Chester , Frederick 
D. } Observations on. . . . 
Solanum tuberosum, host to Puccinia pittieriana P. Hennings n. 
sp. Hedwigia, 43 :147. 16 May 1904. 
Solenia gracilis Copeland n. sp. ad lignum putrifum Alni. Ann. 
Mycolog. 2 :5o8. 10 Dec. 1904. 
Sophia incisa (Englm.) Greene, host to aecidium of Puccinia 
subnitens Diet. [Bates.] Jour. Mycol. 11 :55. Mar. 1905. 
Spaulding, Perley. Two Fungi growing in Holes made by 
Wood-boring Insects (Flammula sapineus and Claudopus 
nudulans). Mo. Bot. Garden, 15:73-7. PL 25-7. 30 April 
1904. 
Sphacelotlieca chrysopogonis Clint, n. sp. Host : Chrysopogon 
nutans. Proc. Boston Soc. Nat. Hist. 31:387- Oct. 1904. 
Sphacelotheca DeBy. [Endothlaspis Sor.] Proc. Boston Soc. 
Nat. Hist. 31:383. Oct. 1904. 
Sphacelotheca hydropiperis borealis Clinton n. var. Host: 
Polygonum bistortoides. Proc. Boston Soc. Nat. Hist. 
311395. Oct. 1904. 
Sphacelotheca nealii (Ell. & And.) Clint, n. comb. [Ustilago 
nealii Ell. & And., U. floridana Ell. & Ev. herbarium name.] 
Proc. Boston Soc. Nat. Hist. 31 .-389. Oct. 1904. 
Sphacelotheca seymouriana Clint, n. sp. Hosts : Andropogon 
virginicus, Andropogon sp. Proc. Boston Soc. Nat. Hist. 
31 .-387. Oct. 1904. 
Sphacelotheca strangulans (Issat.) Clinton n. n. [Ustilago 
strangulans Issat.] Proc. Boston Soc. Nat. Hist. 31 :392. 
Oct. 1904. 
Sphaeria calva Tode. A. P. Morgan. [Note and description.] 
Jour. Mycol. 11:1-2. Jan. 1905. 
Sphaerosoma, a New Species of. Fred. Jay Seaver. Jour. 
Mycol. 11:2-5. PI. 75. Jan. 1905. 
Sphaerosoma echinulatum Seaver n. sp., on surface of damp soil 
in woods. Jour. Mycol. 11:2. Jan. 1905. 
Stereocaulon, see Lichens , Stereocaulon. . . . 
Stevens, F. L. Oogenesis and Fertilization in Albugo ipomoeae- 
panduratae. Bot. Gaz. 38:300-2. Oct. 1904. 
