684 THE H^MATOZOA OF AUSTRALIAN REPTILIA, I., 



positions. It usually lay against the side of ihe erythrocyte, 

 the parasite occupying a large part of the extranuclear area, 

 especially the centre. Probably, as the htemogregarines become 

 more mature, the host-nucleus would be ejected, as frequently 

 happens in reptilian blood cells infected by members of this 

 group. * Some of the infected cells appeared larger than normal, 

 but not markedly so. 



The presence of a " tail " and the effect produced on the host- 

 cell, show that the organism belongs to the subgenus Karj/oli/sus. 

 The name Hcemogregarina (Km-yolt/sus) varanicola is proposed 

 for this parasite. The type-slide has been presented to the 

 Trustees of ohe Australian Museum. 



Varanus varius ranges over Eastern Australia. 



'!l^ 



HiEMOGREGARINA (KaRYOLYSUS) HINULI^, n.sp. 



(Plate XX., figs.17-20.) 



This hajmogregarine was detected in blood-films from a skink, 

 Lygosotna (Hinulia) quoyi Dum. k Bibr., shot at Milson Island, 

 Hawkesbury River, in March, 1909. Very few parasites were 

 present, and these with few exceptions were all of the one form, 

 being approximately kidney-shaped, as will be seen from tlie 

 figures. The length was from 0-015 to 0-018 mm., the breadtli, 

 which was fairly uniform in each parasite, being from 0005 to 

 U0065 mm. In only one form was the pi-esence of a tail dis- 

 tinguisliable. In this parasite, which was partly extruded from 

 the host-cell, one end was broad and rounded while the other 

 tapered somewhat, to end in a " tail " which was lient round on the 

 "body." This oiganisiu was much longer than any of the others 

 seen, being about 0-025 mm. in length, the breadth at the anterior 

 end being 0055 mm., decreasing to 0-0036 mm. just l)ehind the 

 nucleus, which in this case was located posteriorly near the point 

 where the tail began to bend I'ound. The nucleus itself in this 

 specimen was square, with a side of 0-0035 mm., and showed in 

 its centre a small clear spot occupied by a minute central dot. 

 The nucleus in the other specimens, when seen, was a rather 



