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Fig. 22. Larger flagellate. Blepharoplast slightly oblique, extending right across body. 
Intestine of adult. Giemsa. 
Fig. 23. Form with somewhat slender posterior end and “peg-top” like appearance. 
Crop. Delafield. 
Figs. 24, 25. Forms showing vesicular nuclei and distinct flagella. Stomach. Giemsa. 
Fig. 26. Flagellate with long drawn out body. Alveolar protoplasm, containing chromidia. 
Rather compact nucleus. Stomach. Gentian violet. 
Fig. 27. Crithidia with very well-marked flagellum. Stomach. Gentian violet. 
Fig. 28. Flagellate with well-marked chromidia and alveolar protoplasm. Stomach. 
Thionin. 
Fig. 29. Narrow form of flagellate. Intestine. Giemsa. 
Fig. 30. Flagellate showing twist on the body. Crop. Delafield. 
Fig. 31. Flagellate with protoplasm perhaps suggestive of a cytopharynx. Stomach. 
Thionin. 
Fig. 32. Flagellate with large chromatic basal granule near the blepharoplast from 
which the flagellum arises. Stomach. Thionin. 
Fig. 33. Narrow form with flagellum showing only as a line along the body. Intestine. 
Giemsa. 
Fig. 34. Parasite showing rather wide membrane. Nucleus with regularly arranged 
chromatin granules. Vacuole at posterior end. Intestine. Giemsa. 
Fig. 35. Flagellate with well-marked round nucleus and myonemes in membrane. 
Intestine. Delafield. 
Fig. 36. Short form common in the rectum. Delafield. 
Fig. 37. Rather broad flagellate with well-marked flagellum. Stomach. Thionin. 
Fig. 38. Flagellate showing “peg-top” form and large, round nucleus. Intestine. 
Delafield. 
Fig. 39. Very long form with well-marked oval nucleus, alveolar protoplasm and 
chromidia. Very pointed posterior end. Stomach. Gentian violet. 
Fig. 40. Critliidia showing broad flagellar end. Intestine. Gentian violet. 
Fig. 41. Short parasite showing myonemes in the membrane. Crop. Delafield. 
Fig. 42. Longer form with well-marked myonemes in the membrane. Chromidia near 
the anterior end. Stomach. Delafield. 
Fig. 43. Long parasite with broad anterior end, alveolar protoplasm and large basal 
granule. Intestine. Gentian violet. 
Fig. 44. Large form of Crithidia with very well-marked thick flagellum and myonemes 
in membrane. Rather broad posterior end. Crop. Delafield. 
Fig. 45. Extremely long Crithidia with well-marked nucleus and blepharoplast; 
membrane and myonemes very distinct. Stomach. Gentian violet. 
Fig. 46. Narrow parasite with very marked flagellum. Intestine. Delafield. 
Fig. 47. Portion of aggregation-rosette of Crithidia gerridis massed around a food 
particle and parasites attached to the particle by their flagella. Stomach. Thionin. 
Figs. 48—58. Stages in division. 
Fig. 48. Early stage of division of flagellate. The blepharoplast has divided, the 
flagellum has begun to divide. Intestine. Thionin. 
Fig. 49. Further stage in division. Two flagella, nuclei and blepharoplasts are present. 
Stomach. Giemsa. 
Fig. 50. Dividing form showing cleft appearing between the bodies of the daughter 
forms. Stomach. Thionin. 
Fig. 51. Form showing division of membrane. Stomach. Thionin. 
Fig. 52. Further stage in division. Stomach. Delafield. 
