CALOCYLINDRTJS. 31 



C. SPHALEROSTICHUM, Nord. Plate LVII, figs. 26, 27. 



Cells small, somewhat longer than broad, sinus narrow 

 linear ; semi-cells subreiiiform-trapezoid, base straight ; in- 

 ferior angles nearly right ; ends in middle truncate and 

 nude, granulate, granules often in two or three vertical 

 series, often scattered, inconstant as name implies. In ver- 

 tical view elliptic, margins granulate ; in lateral view circu- 

 lar, granulate. Zygospore globose or subglobose, smooth. 

 Diameter 13-14 yw ; length 16-20 yu. 



New Jersey and Pennsylvania, Resembles C. orthosticum, 

 Lund., but is somewhat smaller, ends truncate and granules 

 not so regularly arranged. 



C. CONSPERSUM, var. RETUSUM, Wolle. Plate LXII, fig. 5. 



(Comp. Des. U. S. p. 75.) 



Unlike the true form in the depressed or retuse ends ; 

 sides also incline inwardly from the base of the semi-cell to 

 the end. 



Diameter averages the same as the type-forms. 

 Ponds, Minnesota. 



C. PARDALIS, Cohn. Plate LX, figs. 3-5. 



Cells suborbicular or subquadrate, equal or slightly 

 longer than broad, constriction narrow linear or often some- 

 what dilated inwardly, and more or less ampliated out- 

 wardly ; semi -cells transversely oblong, subreniform ; base 

 and vertex truncate or concave, angles inferior and superior 

 rounded ; lateral view suborbicular ; vertical view oblong, 

 sides straight ; membrane verrucose, verrucae (papillae) 

 obtuse, regularly arranged in diagonal rows. 



Diameter 54-57 ^ ; length 75-80 /* ; thickness 39 /* ; 

 isthmus 18-20 //. 



Lagerheim reports this African plant from Tewksbury, 

 Mass. It has not come under my notice. Looks like a close 

 relation to some form of C. compersum. The figures repre- 

 sent a front, a lateral and a transverse view, copied from 

 Cohn's figures. 



C. POLYMORPHUM, Nord. Plate LX, figs. 31-33. 



Suborbicular, deeply constricted, sinus narrow linear ; 

 semi-cells semi-circular, base straight, end truncate ; two 

 granules above the base, three about the middle of the area ; 



punctate between the two series ; granulate near the margin : 

 3 



