SUMMARY 



A great divergency exits among specialists with regard to the system 

 of Haemosporidia; it seems, however, that with the knowledge actually 

 possessed about such parasites, it is possible to classify them in a suffi- 

 ciently logic manner. It is, however, necessary, in the first place, to sepa- 

 rate the Haemosporidia from the Haemoflagellata, since the close rela- 

 tions, established by SCHAUDININ in his work on alternate generations, 

 do not exist among such protozoa. Thus, the keeping of the Haemospo- 

 ridia together with the Haemoflagellata, does not appear reasonable, in 

 the Binucleata order, as proposed by HARTMANN. This order, however, 

 may be kept as regards the Flagellata possessors of nucleus and blepha- 

 roplastus (independently of the hypothesis of its being a second nucleus 

 of cellules), thus becoming constituted of 2 families: Trypanoplasmidae 

 with 9 genera as follows: Trypanophis, Bodo (= Prowazekia) , Trypano- 

 plasma, Leptomonas, Leishmania, Herpetomonas, Chritidia, Trypanosoma 

 and Endotrypanum. 



Reviewing the different classifications of the Haemosporidia, it is ve- 

 rified that in general they tend, by preference, to group their constitu- 

 tive elements, rather to the morphological characters of parasites, than 

 to the indications given by their evolutive cycle; thence arises the want 

 of homogeneity which is observed in the classifications of Haemosporidia. 



The Author, basing himself not only on the morphological characters 

 of the different haematozoa, but particularly on the knowledge which is 

 possessed respecting their evolutive cycle, proposes a new systematical 

 grouping for the sub-order of the Hasmo'cytozoa, dividing it in 4 super-fa- 

 milies as follows: Haemogregarinoidea, POCHE, 1913, Achromaticoidea 

 nov. superfam., Plasmodoidea nov. superfam., Toxoplasmoidea, nov. su- 

 perfam.. 



The Haemogregarinoidea superfamily is divided into two families, that 

 is: Haemogregarinidae with the genera: Haemogregarina, Lankeste- 

 rella, Karyolysus, and Hepatozoon; and the Leucocytozoidae family with 

 the genus Leucocytozoon. The Achromaticoidea super-family includes 2 

 families: the Achromaticidae with the genera Achromaticus, Smithia, 

 Elleipsisoma, Rossiella and Rangelia; and Theileridae family n. f. with 

 the genus Theileria. 



The Plasmodoidea super-family is subdivided into 2 families: Haemo- 

 proteidae with the genus Haemoproteus, and Plasmodidae with the ge- 

 nera Plasmodium and Haemocystidium and the sub-genus Laverania. 



The Toxoplasmoidea super-family, which is considered by the Author 

 as an appendix, in the Haemosporidia system, includes one family only, 

 the Toxoplasmidae, and one only genus, the Toxoplasma. The Author is 

 of opinion that the Toxoplasma avium MARULLAZ, 1913, is not a real 

 toxoplasma but rather a Haemogregarinideus of the Hepatozoon type. 



