66 Gregarines, various spores. (After Léger) 134 67 _Eimeria_ (_Coccidium_) _schubergi_, life-cycle diagram of. (After Schaudinn) 139 68 _Eimeria avium_ in gut epithelium of grouse chick. (After Fantham) 143 69 _Eimeria avium_, life-cycle, diagram of. (After Fantham) 144 70 _Eimeria stiedæ_ in section of rabbit’s intestine 145 71 _Eimeria stiedæ_, oöcysts from rabbit’s liver. (After Leuckart) 146 72 _Eimeria stiedæ_, spores. (After Balbiani) 146 73 _Eimeria stiedæ_, schizogony. (After R. Pfeiffer) 146 74 _Eimeria stiedæ_, section through infected nodule of liver 147 75 _Isospora bigemina._ (After Stiles) 150 76 _Hæmoproteus_ (_Halteridium_) _columbæ_, life-cycle. (After Aragão, from Castellani and Chalmers) 152 77 _Leucocytozoön lovati._ (After Fantham) 153 78 Hæmogregarines from lizards. (After França) 154 79 _Leucocytogregarina canis_, life-cycle. (After Christophers, from Castellani and Chalmers) 155 80 _Plasmodium vivax_, life-cycle. (After Schaudinn and Grassi) 160 81 Malignant tertian malarial parasite in intestine of _Anopheles_. (After Grassi) 162 82 Oökinete of malignant tertian malaria in stomach of _Anopheles_. (After Grassi) 162 83 Section of stomach of _Anopheles_ with malarial oöcysts. (After Grassi) 163 84 Sporulation of malarial parasites in _Anopheles_. (After Grassi) 163 85 Tertian malarial parasite in human red blood corpuscles. (After Mannaberg) 165 86 Quartan malarial parasite in human red corpuscles. (After Manson) 166 87 Malignant malarial parasite in human red corpuscles. (After Manson) 168 88 Malarial crescents. (After Mannaberg) 168 89 Section through tubule of salivary gland of _Anopheles_ infected with malarial sporozoites. (After Grassi) 169 90 _Nuttallia equi_, life-cycle in red blood corpuscles. (After Nuttall and Strickland) 173 91 _Babesia_ (_Piroplasma_) _canis_, life-cycle in blood of dog. (After Nuttall and Graham-Smith) 175 92 _Theileria parva._ (After Nuttall and Fantham) 179 93 Myxosporidian spores and infected gill of fish. (After J. Müller) 181