JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE XA^III, 



Illustrating Surgeon-Major Cuuniugham's Memoir ou the 

 '^ Development o£ Certain Microscopic Organisms 

 occurring in the Intestinal Canal." 



Tig. l.—Pedicillate sporangia of Protomyxomyces. x '14. 



Tig. 2. — Ruptured sporangium with mass of escaped spores, x 90. 



Tig. 3. — Portion of an immature sporangium, sliowing its formation by 

 aggregation of amoeboid bodies, and some formed spores, x ISO. 



Tig. 4. — Abnormal dendritic form of sporangium, x 44. 



EiG. 5. — Portion of one of the branches of a dendritic sporangium showing 

 contained spores, x 180. 



Fig. 6. — Sporangial membrane studded witli organic granules, x 1000. 



Tig. 7. — Biconcave spores from a mature dry sporangium, x 1000. 



Fig. 8. — {a) Mature spore in nutritive fluid ; (/;, c) emergence of Amopbulre 

 from simihar bodies. X 1000. 



Fig, 9. — Protomyxomycete Amcebaj in different stages of development. 

 X 1000. ' 



Fig. 10. — Fully developed Ammba. x 1000. 



Fig. 11. — A similar body showing subdivision of nucleolus, x 1000. 



Fig. 12. — Portion of sporangium containing fusiform, nucleated spores. 



X 1000. 

 Fig. 13. — {a) Mass of fusiform spores as first expelled from a ruptured 



sporangium : {b) Individual spores after solution of the gelatinous 



investing substance of the mass, x 1000. 



Fig. 14. — Larger aggregate of fusiform spores, x 1000. 

 Fig. 15. — Structure of the nucleus in a fully developed Protomyxomycete 

 Amoeba, x 1000. 



Fig. 16. — Various stages in the development of fusiform spores in nutritive 

 fluid, showing the transition through the monad to the amoebal con- 

 dition. X 1000. 



Fig. 17. — Various forms presented by Protomyxomycete zoospores and 

 process of multiplication by transverse division, x 1000. 



Fig. 18. — Zoospores from human excreta, x 1000. 



Fig. 19. — Large amcebal form in human excreta, x 1000. 



Fig. 20. — Sporoid cells developed from an Amojba, with remains of the 

 parent body as a gelatinous investment, x 1000. 



Fig. 21. — Aggregate of sporoid cells in a cultivation of human excreta. 

 X 410. 



