326 THAXTBB. — MONOGRAPH OF THE LABOULBENIACEiE. 
Sphaleromyces Latonse nov. nom. Plate L, figs. 1-3. 
Corcthrom ,,<< « Latonce Thaxter. Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 41. June, 1901. 
iW'Il 
flated; the lip-cells forming a small short, slightly bent, nearly cylindrical, truncate, or papillate terminal 
projection, which is rather abruptly distinguished; the secondary stalk-cell, and the basal cell above it, 
bulging outward more or leas prominently, and separated by a rather conspicuous irregular indentation: 
the stalk-cell small and squarish. The basal cell of the receptacle asymmetrical; its anterior margin 
i might and perpendicular, the posterior slightly curved and oblique; its distal margin oblique with a 
posterior protrusion; its slender base translucent, but otherwise opaque, the opacity involving a portion 
of the small flattened subtriangular subbasal cell. The appendage consisting of a series of about five 
successively smaller hyaline cells, the lowest greatly flattened; the series above, the distal cells of which 
icon disappear, often turned outward .so as to become almost horizontal in position, giving rise from their 
sides to numerous hyaline branches, which may be more or less copiously branched. Spores about 
inner 
35 X 2 n. Perithecium 90-105 X 20-25 tx, the stalk and basal cells together 20-25 ft. Receptacle 110 X 
)0 (distal end) X 10 /t (base). 
225-250 
Museum 
( )n the legs and abdomen of Latona Spinolae Guer. Bogota, Columbia. Berlin 
Although I have been unable to determine with absolute certainty, young specimens of this species 
appear to produce solitary antheridia on the branchlets, and I have therefore included the species in 
Sphaleromyces to which in other respects it corresponds exactly; although somewhat peculiar from its 
ondensed primary appendage and large opaque distally prominent basal cell. The types were found in 
company with Laboidbenia Latonce on various parts of the host. 
Sphaleromyces obtusus Thaxter. Plate LIT, figs. 11-13. 
Proc Am. Ac I. Arts, and Sci., Vol. XXXV, p. 410. April, 1900. 
Pcrithccia relatively large, clear dark brown becoming almost opaque; the inner margin nearly 
straight, the outer strongly convex; tapering very slightly basally and distally; the tip paler brown, 
abruptly distinguished, and when viewed sidewise flaring, with straight divergent lateral margins, the 
distal margin as broad as the portion of the perithecium below the tip, and slightly concave, the outer lips 
more prominent and much broader than the inner: when viewed at right angles to this position the tip 
appears in general bluntly rounded, not expanded, the more or less papillate tips of the lip-cells situated 
in asymmetrical pairs, which are visible above and below a broad bluntly rounded median portion between 
them: the basal cells colored like the perithecium, distinct, hardly broader than the stalk-cell which is 
hyaline contrasting thick-walled and about twice as long as broad. Receptacle small, suffused with brown, 
two celled; the septa somewhat oblique, the upper cell contrasting abruptly with the colorless stalk-cell, 
and giving rise laterally to the slightly divergent appendage, which consists of from five to six nearly opaque 
brown cells, separated by oblique septa; each producing distally on the inner side a short hyaline branch, 
sometimes once branched. Spores about 40X3.5 ;i. Pcrithccia 140-150X40-45 ft, the stalk-cell 
35 X 20 pi. Receptacle not including foot 27-35 X 10 ft. Appendage, mostly broke 
length to tip of perithecium 230-245 ju. 
On lathrobncm Illyricum Dej., British Museum, No. 384. Algeria (?). On superior surface of 
abdomen. 
70-100 u. Total 
Sphaleromyces PBOPINQUU8 Thaxter. Plate LII, figs. 14-10. 
Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 441. Apiil, 1000. 
Like S. obtusus in size, form, and color, except that the tip of the perithecium is symmetrical or nearly 
o, the lips forming a broadly rounded blunt terminal prominence with sometimes a slight median eleva- 
tion, while at the base the tip is characteristically broadened through the presence of distinct lateral ele- 
vatioi on either side: the stalk-cell rather abruptly swollen below the basal cells of the perithecium. 
On Lathrobiinn, sp. indet., British Museum, No. 383. Europe. On superior surface of abdomen. 
