_Myiasis externa_ 715 _Gastricolous Oestridæ_ (Creeping Disease) 729 APPENDIX ON PROTOZOOLOGY 733 I.--NOTES ON RECENT RESEARCHES 733 Differences between _Entamœba histolytica_ and _E. coli_ 733 Phagedænic Amœbæ 733 _Endamœba gingivalis_ 733 _Entamœba kartulisi_ 734 _Craigia_ and Craigiasis 734 Human Trichomoniasis 734 _Chilomastix_ (_Tetramitus_) _mesnili_ 735 _Giardia_ (_Lamblia_) _intestinalis_ 736 _Cercomonas hominis_ 736 Transmissive Phase of Trypanosomes in Vertebrates 737 _Trypanosoma lewisi_ 737 Blepharoplastless Trypanosomes 737 The Experimental Introduction of certain Insect Flagellates into various Vertebrates, and its bearing on the Evolution of Leishmaniasis 737 The Transmission of _Spirochæta duttoni_ 739 _Spirochæta bronchialis_ 739 The Spirochætes of the Human Mouth 740 Coccidia in Cattle 741 The Hæmosporidia 742 The Leucocytozoa of Birds 742 II.--FORMULÆ OF SOME CULTURE MEDIA 742 Culture Media for growing Amœbæ 742 Culture Media for the growth of Protozoa parasitic in the Blood 744 III.--BRIEF NOTES ON GENERAL PROTOZOOLOGICAL TECHNIQUE 745 Fresh Material 745 Stained Material 747 Fixatives 748 Stains 749