M. A. SclmeiJer on Oplnyocjstis Biitschlii. 313 



(pseudopodia) and of the sporulation, or as jMyxosporidia, 

 considering especially the falciform corpuscles, will it not be 

 best to make them provisionally the representatives of a sepa- 

 rate order, under the name of Amoebosporidia? 



EXPLANATION OF PLATE X. 



Fig. 1. Rectum of the Blaps at its junction with the stomach. On the 

 surface there are sinuous projecting cords, formed by the Malpi- 

 ghian canals distended by Ophryocystis Biitschlii. 

 Figs. 2 to 9 and 11. Various states, such as one observes in slightly salt 

 water. The expansions are more or less numerous, and some 

 specimens show their nucleus or nuclei. 

 Figs. 10, 12, 13, and 14. Specimens stained with picrocarmine, rendered 

 transparent with oil of cloves, and preserved in balsam. In these 

 we clearly distingui.'ih the nuclei luruished with one or two nu- 

 cleoli. 



Ilg. 15. Transparent cyst with sporoblast. 



Fig. 16. Two individuals conjugating. 



Fig. 17. Transparent cyst with young spore. 



Fig. 18. Two conjugated individuals, but still without double-contoured 

 walls. 



Fig. 19. State of conjugation, rendered transparent, to show the six nuclei. 



F'ig. 20. Cyst with spore. In this we see four nuclei belonging to 

 sporozoites. 



Fig. 21. Individual with a single nucleus, transparent. 



F'ig. 22. State of conjugation ; four nuclei. 



Fig. 2.S. State of conjugation, with six nuclei. 



F\g. 24. Cyst with formed spore. We see the optical section of seven 

 nuclei belonging to sporozoites. 



Fig. 25. State of conjugation, iirst phase, transparent. 



Fig. 26. State of conjugation ; four nuclei. 



Fig. 27. Individual with a single nucleus, drawn in the fresh state. 



Fig. 28. Cyst at the beginning of its formation, but with double wall. 

 The two nuclei are .^een shining through. 



Fig. 29. Cyst with spore and granular hoods ; fresh. 



F'ig. 30. Cyst organizing only a single spore ; fresh. 



Fig. 31. Cyst with a perfectly mature spore and with sporozoites marked 

 by fine lines. It will be remarked that the cyst is capped by 

 two systems of membranous hoods packed one ins^ide the other, 

 and here slightly raised or pushed to one side. 



Fig. 32. Cyst with spore, the contents of which are not yet transformed 

 into sporozoites. 



Fig. 33. Mature spore in its cyst. 



Fig. 34. Spore of a somewhat different form. 



Fig. 35. Another form. 



Fig. 36. A spore of normal facies, isolated. 



Fig. 37. A cyst with a single black spore, rendered transparent. 



Fig. 38. A cleared cyst, with a spore presenting four nuclei, orie;iteJ as 

 if they proceeded from the division of two polar nuclei. 



Fig. 39. Fresh cysts organizing two spores. 



Fig. 40. Another cyst in the same case, but with one of the sporea 

 affected by arrest of development. 



Fig. 41. Fresh cyat with young sporoblast in the centre. 



