YEAST-LIKE FUNGI OF HUMAN INTESTINAL TRACT 43 



CRYPTOCOCCUS OVOIDEUS SP. NOV. 



Morphology. Cells in young cultures are round or oval, and fairly uniform 

 in size and shape; in old culture cells are oval or broadly elliptical, varying 

 markedly in size and with few budding cells. There are no elongated cells or 

 hyphal elements. The size is 3.5 X 4.5 microns. (Plate 3, Figs. 1, 2.) 



Cultural Characters. On glucose agar the streak is filiform, slightly raised, 

 glistening, smooth, and chalk-white. The growth is slow and there is little 

 change in old cultures. There is a filiform growth in gelatin stab, with no 

 liquefaction. No pellicle or ring is present in beerwort or in liquid sugar 

 mediums. Giant colonies may be seen in Plate 6, Fig. 17, and in Plate 8, Fig. 20. 



Physiologic Characters. There is slight fermentation of glucose, levulose, 

 and sucrose. This occurs only after a week and the production of gas is never 

 over 10 per cent, of the closed arm of the tube. No decided change in acidity 

 occurs in sugar mediums. There is no change in litmus milk. 



The culture was isolated from human feces. (Culture 137.101; Type Speci- 

 men 5; Type Slide 137.1.) 



This species is very similar in many of its characters to Culture 170.101. 

 The latter, however, ferments glucose and levulose very rapidly and completely. 

 Both of these cultures are slow growing, very smooth, and remain white and 

 even-edged in very old cultures. The surface elevation is not so decidedly 

 convex as in most yeasts of the white, glistening type. 



CRYPTOCOCCUS GLABRATUS SP. NOV. 



Morphology. Cells in young cultures are oval or elliptical, and fairly uni- 

 form in size and shape; in old cultures cells are round, oval, or elliptical, and 

 more variable in form and size. Budding occurs from the ends or shoulders 

 of the oval and elliptical cells. There are no elongated cells or hyphal elements. 

 The size is 3 X 4.5 microns. (Plate 3, Fig. 12.) 



Cultural Characters. On glucose agar the streak is filiform, glistening, 

 raised, smooth, and chalk-white. In old cultures the surface remains smooth 

 and the edge entire. There is a slow growth on all solid mediums; liquid 

 mediums remain clear with little evidence of growth, and no pellicle or ring 

 formation is present. A giant colony may be seen in Plate 8, Fig. 21. 



Physiologic Characters. There is rapid fermentation of glucose and levulose. 

 Other sugars are not fermented. Litmus milk becomes only slightly alkaline. 

 No decided change in acid reaction occurs in sugar mediums. Gelatin is not 

 liquefied. 



The culture was isolated from human feces. (Culture 170.101; Type Speci- 

 men 6; Type Slide 170.) 



This species differs in few respects from Cryptococcus ovoideus. The cells 

 are more elliptical and the fermentation reactions are unlike. 



MYCODERMA MONOSA SP. NOV. 



Morphology. Cells in young cultures are elliptical or narrowly elliptical; 

 in old cultures cells are of various forms, predominantly elliptical, with 

 numerous elongated and irregular forms. Rows of elongated cells in old cul- 

 tures form a false mycelial development. No true septation is observed. Bud- 

 ding occurs from the ends or from shoulders of the young cells. The size is 

 2 X 5.5 microns. (Plate 3, Figs. 14, 15.) 



Cultural Characters. On all agar slants the streak is spreading, dull, white, 

 flat, and becoming gray with age. A heavy dull pellicle is formed within 24-48 



