154 K. A. MINCHIN AND H. M. WOODCOCK. 



Figs. 29-31. — Ti-ypanosoma triglse. 



Figs. 32-37. — T. raiae. Fig. 33 is of a small parasite, fig. 35 of an 

 intei'mediate sized one; the rest are of large individuals. 



In fig. 31' the small vacuolar spaces were originally occupied by 

 l)lack grains similar to those seen in the parasite of fig. 37. 



Fig. 38, a-d. — T. raiai, trophonnclei of different jjarasites (x 3000). 



PLATE 9. 



Figs. 39-50. — H. rovignensis. Figs. 39-43 are from the first in- 

 fected fish, figs. 44-50 from the second one. 



Figs. 39-43, 46, 47. — Ordinary small forms (schizonts). 

 Figs. 44, 45. — Young and intermediate-sized individuals respec- 

 tively of the slender or male type. 

 Figs. 48, 49.— Large forms of the broad, female type. 

 Fig. 50. — Large individual of the slendei", male type. 

 Fig. 51. — Trypanosoma triglse. 

 Figs. 52-56.— T. raia3. 



Fig. 55. — The trypanosome of this figure is on a different film 

 from the others, one from which the stain has been consider- 

 able more extracted. 



Fig. 57, a-i. — T. raia?, trophonnclei from vai'ious trypanosomes ; 

 e and h are from large trypanosomes, the rest from smaller or inter- 

 mediate-sized parasites (x 3000). 



PLATE 10. 



Figs. 58-64. — H. rovignensis. Fig. 58 is on a film from which the 

 red part of the stain (neutral red) has been much less extracted than in 

 other cases. 



Figs. 58-61. — Ordinary small forms. 

 Figs. 62, 64. — Large broad forms. 

 Fig. 63. — Large slender form. 

 Fig. 65. — T. triglse. 

 Figs. 66, 67.— T. raise. 



Fig. 68, o-/. — T. raise, trophonuclei from various individuals; d-f 

 from large parasites (x 3000). 



