482 THE HiEMATOZOA OF AUSTRALIAN KEPTILIA, II., 



have identified the hist-meiitioned as being specifically iden- 

 tical with B. . chelodina, already described by us (1909, p. 

 97) from another tortoise, Clidodina longicollis Shaw, from 

 the Sydney district. We have also seen a few parasites be- 

 longing to this species in a Western Australian representative, 

 Chelodina ohlonga, taken near Pertli. 



The parasites vai'ied in size from G'Dxo-o// to 12-5 x 10 /x,. 

 the average size being about 1 1 x 8 /y.. A few foiMus were 

 practically circular in outline, but most of them were ellipti- 

 cal or of a distorted reniform shape. In all cases observed, 

 the position occupied was between the nucleus and one end 

 of the cell. There were two types of the haematozoon present. 

 Some of the organisms when stained with Giemsa, were 

 coloured a uniform and fairly deep bhie. In these parasites, 

 no nucleus was recognisable. Others were very lightly stained, 

 and, in these, a more or less definite and rounded, large 

 purplish nucleus was seen lying centrally. These cells pos- 

 sessed rather larger melanin-granules than the more deeply 

 staining forms. Two vacuoles were usually present, but their 

 position was variable. The melanin-granules were relatively 

 thick and abundant. More usually they were mainly aggre- 

 gated near the mid-region, but a number were peripherally 

 situated. In some cases, the arrangement was quite irregu- 

 lar, the individual grains remaining isolated. The host-cell 

 was not in any way distorted, nor was its nucleus displaced. 



HiEMOGREGARINA CLELANDI Justu. 



(Plate xiv., figs. 1-25). 



This h^matozoon was originally described (Johnston, 1909,. 

 p. 407) from the West Australian tortoise, Chelodina ohlonya. 

 We have since found it in Emydura krefftii and Chelodina longi- 

 collis. Films were forwarded to us in Apiil, 1910, by Dr. T. L. 

 Bancroft, who took the smears from two of the former species, 

 one at Petrie's Creek, and the other at Enoggera, Queens- 

 land. The specimen from Petrie's Creek showed, as already 



