Explanation of Plates 303 



behavior. If the paper is placed only partly on the bottom of the dish the 

 Plasmodium will travel over the bare glass, and the dish may be placed on the 

 microscope for observation of the circulation or rhythmic streaming of the 

 protoplasm which pauses at short intervals and reverses the direction of its 

 flow. If food is withdrawn, the plasmodium may eventually form fruiting 

 bodies, but if dried too rapidly it will, more likely, pass again into sclerotium. 



Fig. 3. Badhamia magna X 3 (p. 20). Bluish sporangia on long, yellow 

 stalks. 



Fig. 4. Badhamia gracilis X 9 (p. 24). Grayish white sporangia on 

 yellowish stalks. 



Plate 7 



Fig. 1. Spores of Badhamia Dearnessii X 700 (p. 24). The spores are 

 purplish brown and encircled by a narrow, pale band which is equally spinulose 

 with the remainder of the spore. 



Fig, 2. Physanim sidphureum X 9 (p- 34). Sulphur-yellow sporangia 

 on white or yellowish stalks. 



Fig. 3. Physarum polycephaliim X 9 (p. 46). The phase with single 

 sporangia, yellow fading to gray, on yellow stalks. 



Fig. 4. Physarum didermoides X 6 (p. 54). White sporangia on white, 

 membranous stalks. 



Fig. 5. Physarum pezizoideum X 9 (p. 55). White sporangia on reddish 

 stalks. 



Plate 8 



Fig. 1, Physarum compressum X 9 (p, 59), White sporangia on black 

 or white stalks. 



Fig. 2. Physarum superbum X 6 (p. 65). Sessile plasmodiocarps, red 

 or yellow. 



Fig. 3. Physarum gyrosmn X 6 (p, 66). Sessile sporangia forming 

 rosettes, pinkish or bluish gray. 



Fig. 4. Physarum virescens X 6 (p. 77). Sessile, greenish yellow spor- 

 angia in small clusters. 



Fig. 5. Physarella oblonga X 9 (p. 84). Olive-yellow or brown sporangia 

 on reddish stalks, unopen; the sporangia open eventually disclosing spike- 

 like processes on the inner side of the wall. 



Fig. 6. Cienkowskia reticulata X 3 (p. 85). The applanate, depressed 

 phase which is more common in eastern North America than the terete, netted 

 plasmodiocarps; color mottled with yellow or red. 



Plate 9 



Fig. 1. Craterium minutum X 9 (p. 86). The phase with long cylin- 

 drical sporangia; the color is brown on brown stalks. The common phase is 

 funnel-shaped. 



Fig. 2. Dider?na niveum X 6 (p. 99). Sessile, white sporangia with 

 yellow inner walls and large yellow columellae. 



Fig. 3. Diderma Trevelyani X 6 (p. 104). Sessile reddish or brownish 

 sporangia dehiscing by petaloid lobes. 



