In the normal toad, Bujo arcnarum, glucose and galactose are absorbed from the gut 1.7 times faster than xylose in 8 hrs. Fructose is absorbed only slightly more slowly than glucose and galactose. The absorption of these sugars was not modified by insufficiency of the pituitary (total extirpation or extirpation of the principal lobe only, 13 to 20 days previously) or of the adrenals (destruction 1 to 3 days before) even when other symptoms such as asthenia and gastrointestinal dilatation were present.