A. Pouter 
391 
Fig. 39. Early stage of division seen from the side. Blepharoplast divided. Nucleus 
constricted. The “double flagellum” stage. Giemsa. 
Fig. 40. Further stage in division. Nucleus, blepharoplast and flagellum all divided. 
Delafield. 
Figs. 41, 42. Same stage as in Fig. 40, but seen from the side. Thionin. 
Fig. 43. Daughter organisms widely diverging from one another. Bodies almost 
separated. Giemsa. 
Fig. 44. Division almost completed. The organisms are in a straight line with one 
another, and final separation is about to occur. Delafield. 
Fig. 45. Aggregation rosette of Herpetomonas jaeulum. Flagella attached to food 
particle. Delafield. 
Figs. 46—49. Herpetomonas from the ovaries of Nepa cinerea. 
Fig. 46. Large broad form with alveolar protoplasm, nucleus with fine granules, and 
many chromidia. Flagellum very small. Giemsa. 
Figs. 47, 48. Further stage in degeneration of the Herpetomonas in the ovary. Many 
chromidia scattered in protoplasm. Thionin. 
Fig. 49. Group of four, non-flagellated forms from the ovaries. Very alveolar protoplasm. 
Chromidia. Delafield. 
Figs. 50—68. Post-flagellate stages. 
Fig. 50. Short, broad parasite whose flagellum has almost disappeared. Giemsa. 
Figs. 51, 52. Form showing first division prior to encystment. Fairly large granules in 
nucleus. Delafield. 
Fig. 53. Form after second division prior to encystment. Flagellum as such has 
disappeared. Thionin. 
Fig. 54. Partly divided form that has no flagellum. Thionin. 
Fig. 55. Almost divided parasite with clear, central vacuole at the line of separation. 
Delafield. 
Fig. 56. Small form produced by the division of such forms as those shown in Figs. 54, 55. 
Delafield. 
Figs. 57—66. A series of cysts (post-flagellates) produced by the rounding of small forms. 
Fig. 62 shows two daughter-cysts side by side. There is much variation in the size of 
the cysts, but each shows a nucleus and blepharoplast. 
Fig. 67. Two small cysts. Delafield. 
Fig. 68. Group of cysts. Common in the rectum. Safranin. 
