THE HAEMATOZOA OP AUSTKALIAN BIRDS. 435 



Length about 70 /*, breadth between 5 and 6 /*. The 

 embryos met with in this bird are specifically identical with 

 those seen in Ptilotis fusca and Plectrorhamphus lanceo- 

 latus. (Pig. 34.) 



(18) Microfilaria sp. from the Oriole, Oriolus Sagittarius, 

 Lath. (Dr. Bancroft, Eidsvold, March 1911). 



A single coiled form was detected but no details could 

 be made out. 



(19) Microfilaria sp. from the Crow, Corvus coronoides, 

 Vig.and Horsf. (Dr. Bancroft, Eidsvold, March 1911). 



Length 150 /*, breadth 5*5 /*. These embryos were long, 

 the head rounded in front, the posterior end tapering to a 

 finely pointed tail. The "spots " were situated as indicated 

 in fig. 68. 



(20) Microfilaria sp. from the Grey Jumper, Struthidea 

 cinerea, Gould. (Dr. Bancroft, Eidsvold, Feb. 1911.) 



There were at least two different forms of larvae, one a 

 large form, the other fairly long but more delicate. 



Larger form: — Length about 190 ft, breadth 5/*. The 

 body was of a fairly uniform breadth for the greater part 

 of its length, but the posterior region tapered gradually to 

 end in a pointed tail (fig. 70). Annulations were recognised. 

 The spots were at about 16, 28, and 90 per cent, of the 

 body length. A smaller parasite of the same type measured 

 140 p by 5 /*. 



Smaller form : — Length 85 to 100 /*, breadth 3*5 /*. There 

 was a gradual tapering posteriorly, the tail extremity being 

 rounded. Delicate annulations were present. The anus 

 was not recognised. The other "spots" lay at 23 and 30 

 per cent, of the body length. (Fig. 64.) 



In some films both kinds were present, while in films 

 from other birds only one kind was found. 



