256 
W. E. WADE 
Fig. 2). Oakiand County. [Irénée-Marie, 1938. Flor. Desm. de 
la Région Mont. : 211 ; PI. 31, Fig. U; PI. 32. Fig. 5-6 (C. botry- 
tis var. subtumidum fa)J. 
Forma a varielate typica differens possessione cellularum pro 
porlione latiorum, atque graimloriim regione in cenlrali maio- 
rum. Cellula SS-65 ti long, i5-59 g laL: istlimus tO-ll |1 lat. 
A forin differing from the typical variety by the possession of 
pmportionately wider cells and larger granules in lhe central 
région. Cell length 55-65 ■/., cell width 45-59 j*. isthmus 10-14 
Softwater Lake, Oakiand County, Michigan. 
The Michigan specimens agréé favorabïy with Irénée-Marik’s 
( 1938) unnamed forma in which some of the intramarginal 
granules above the central région of the semicell are very 
strongly developed and a few are emarginate. 
C. boirytis var. tiimidum ta. nudum fa. nov. (PI. 1, I-’ig. 7 ), 
Forma a planta typical differens aul inopia iota aut paulula 
crescenlia granulorum in tumore cenlrali utriusgue semicellu- 
lae: utruque semicellula granulum magnum supraisthmiale 
praebente. Cellula 75 g long, 59 g la!.; islhmus 17 g lat. 
A forni differing from the typical by the complété lack or very 
slight development of granules on the central tumor in each 
semicell. A large supra-isthmial granule présent on each semi¬ 
cell. Cell length 75 g, cell -«idlh 59 g, isthnuis 17 g. Menominee 
County, Michigan. 
The presence of a large supra-isthmial granule on each semi¬ 
cell (which is sometimes présent in the variety tumidmn Wolle) 
in addition to the defmite central protubérance (characteristic 
of the variety) seem valid evidence for designating this orga- 
nisni as a now torin of this variety. 
c. canadense Irénée-Marie. Alger, Barry, Martiuetle, and Washte- 
naw Coiinties. 
c. clepsydra Nordst. Schoolcraft County. 
C. commissurale var. crassuin Nordst. Barry (two stations), 
Calhoun, Gogebic (two stations), Livingston, and Schoolcraft 
Counties. 
c. cucumis (Corda) Ralfs. Barry, Gogcbic, Houghton, and School- 
craft Counties. 
c. cyclicuin var. nordstedlianum (Rcinsch) West and West 
Crawford County. 
C. depressum var. achondriim (Boldt) \\'est and West. Alger, 
Mackiiiac, Marquette, and Presque Isle Counties. 
C. difficile Luetkm. Barry and Delta Counties. 
C. elegantissimum var. simplicius West and West. Calhoun, Goge- 
bic and Roscommon Counties. 
So’--"?’ h'UHN, Pans] 
