480 THE H.EMATOZOA OF AUSTRALIAN REPTILIA, II., 



Tortoise is Eniydura macquariif, which is somewhat like G . 

 longicolUs . The latter, however, is a widespread species in- 

 habiting the whole of the Southern and South-East portions 

 of Australia, as well as extending northwards into Queens- 

 land. The account is very brief and unfigured, and, more- 

 over, the measurements appear to be incorrect. We have met 

 with the same parasite in Emudura kreff'tii, in smears sent 

 down from Queensland by Dr. Bancroft, who made the films 

 from two animals, one captured at Petrie's Creek (April, 

 1910), and the other in the Burnett River recently (Janu. 

 ary, 1911), as well as in a film fi'om C longicolHs, also forwarded 

 recently by him (Burnett River). 



A comparison of our forms with the account given of T. 

 chelodiiia, showed us that the only difference was that of size. 

 It was noticed that, in this account, though the parasites 

 ■were said to be larger than the erythrocytes, yet the dimen- 

 sions given were very much smaller. In order to satisfy our- 

 selves as to the correctness. Dr. H. G. Chapman kindly 

 allowed us to compare our types with those present in a film 

 .sent to him by Dr. Johnson. In addition to the Trypanosome, 

 the latter film contained haemogregarines, similar to the forms 

 referred to by us elsewhere. 



Some figures from the Murray River Tortoise, as well as 

 from Eniydura krefftii, are given. The parasite possessed a 

 fairly constant form, pleomorphism not being detected. The 

 length (excluding the short flagellum) varied from 39-43 /x 

 (14 /i in the original account), and the tlagelluin was very 

 short, being from 3-6 /i. long (2 /a in the original). The 

 bread til of the body of the flagellate, measuring in the region of 

 the nucleus, excluding the undulating membrane, was from 

 3-5"5/x (1'5/x in Johnson), while the undulating membrane 

 varied from 1'5-3'3/x in width. The maximum breadth was 

 thus from 5-8-0 /x. Tlie anterior end was long and narrow, 

 ending acutely, and consequently the point of junction with 

 the short flagellum was not always distinguishable. The 

 main mass of the body was of a fairly uniform breadth, but 



