34 _Trypanosoma cruzi_ in muscle. (After Vianna, from Castellani and Chalmers) 85 35 _Trypanosoma cruzi_, development in _Triatoma megista_. (After Chagas, from Castellani and Chalmers) 86 36 _Trypanosoma cruzi_, forms found in salivary glands of _Triatoma_. (After Chagas, from Castellani and Chalmers) 87 37 _Trypanosoma lewisi_, from rat’s blood. (After Minchin) 89 38 _Trypanosoma lewisi_, from stomach of rat-flea. (After Minchin) 91 39 _Trypanosoma lewisi_, from rectum of rat-flea. (After Minchin) 92 40 _Trypanosoma brucei._ (After Laveran and Mesnil) 94 41 _Trypanosoma evansi._ (Original, Fantham) 96 42 _Trypanosoma equinum._ (After Laveran and Mesnil) 96 43 _Trypanosoma equiperdum._ (Original, Fantham) 97 44 _Trypanosoma theileri._ (After Laveran and Mesnil) 98 45 _Trypanosoma vivax._ (Original, Fantham) 100 46 _Trypanosoma congolense._ (Original, Fantham) 100 47 _Trypanosoma uniforme._ (Original, Fantham) 100 48 _Trypanosoma rotatorium._ (After Laveran and Mesnil) 101 49 _Herpetomonas_, _Crithidia_, _Trypanosoma_. (After Porter) 103 50 _Leishmania donovani._ (After Christophers, Patton, Leishman; from Castellani and Chalmers) 106 51 _Toxoplasma gondii._ (After Laveran and Marullaz, from _Trop. Dis. Bulletin_) 113 52 _Toxoplasma pyrogenes._ (After Castellani, from _Trop. Dis. Bulletin_) 113 53 _Spirochæta balbianii._ (After Fantham and Porter) 114 54 _Spirochæta duttoni._ (After Fantham) 117 55 _Spirochæta duttoni_ and its coccoid bodies in the tick. (After Fantham) 118 56 _Treponema pallidum._ (After Bell, from Castellani and Chalmers) 124 57 _Treponema pallidum_, apparatus for cultivation of. (After Noguchi) 125 58 _Treponema pertenue._ (After Castellani and Chalmers) 127 59 _Monocystis agilis._ (After Stein) 130 60 _Gregarina longa_, stages of growth of trophozoite 130 61 _Xyphorhynchus firmus._ (After Léger) 131 62 _Gregarina munieri._ (After Schewiakoff) 131 63 _Monocystis agilis_, spores. (After Bütschli) 132 64 Gregarines, conjugation and spore formation. (After Calkins and Siedlecki, modified) 133 65 _Stylorhynchus oblongatus_, cyst and gametes. (After Léger) 133