32 



(3) Trypanosoma of Pt'dofis clrnjxops. — In a bird shot at 

 Milson Island, Hawkesbury River, in November, 1914, 

 numerous IlaltericUa were present, and a single well-preserved; 

 trypanosome was seen, as well as several degenerated forms 

 without flagella. This parasite was dark blue, with a pointed 

 posterior end with the micro-nucleus close to the tip. The 

 Ijody was about 17 ju, long, apart from the curves, which would 

 make it about 20 fx, the free flagellum was 12 /x long, and the 

 greatest breadth 3'5 /x. A search for T.eiicnci/tozoa did not 

 reveal any. 



V. MiCROFILARTAE. 



(1 and 2) Microfilariae of Plotns novae-hollandiat and 

 Phalocrocorax sulcirostris. — In October, 1911, we received 

 from Dr. Bancroft at Eidsvold, Queensland, blood smears^ 

 from these two species of birds. My former colleague. Dr. T. 

 Harvey Johnston, was with Dr. Bancroft when the birds were 

 shot, and describes the two species as commingling together. 

 Dr. Johnston lias recorded our findings in a paper read before 

 the Royal Society of Queensland in June, 1912. An examina- 

 tion of these slides shows the presence of sheathed Micro- 

 filariae specifically different from the unsheathed forms pre- 

 viously recorded by us from Phalocrocorax melanoleuciis in 

 our second paper. The Microfilariae showed a well-marked 

 sheath, either as an empty envelope extending beyond one 

 end of the worm, or as a long empty tube left trailing behind 

 as the Microfilariae 'Svriggled" forwards in the drying blood 

 smear. The anterior ends of the bodies were rounded, and the 

 posterior ends rapidly attenuated to a sharp point, thjs feature 

 being somewhat obscured by the sheath. There was indistinct 

 cross-striation. The anterior end showed a clear area from a 

 few up to 7 ja in length, being sometimes mostly occupied by 

 isolated nuclear masses, at others possessing only a small mass. 

 The following are the measurements, in micromillimetres, of 

 several individuals from both species : — 





From 

 P. svlcirostris. 



From 



PIo 



h/.s. 





Anterior clear area 



Anterior end to 1st ''spot" 

 1st -'spot'' (incomplete) ... 

 1st ''spot" to 2nd '^spot" 

 2nd "spot" (V-shaped") ... 

 2nd "spot" to end 



Nuclei occupy 

 most of the 

 specimen 

 43 

 2 

 15-5 

 3-5 

 95 



159 



7 

 40 



2 



15-5 



3-5 



104 



165 

 5 



5 

 35 



2 



14 



3-5 



95 



154-5 

 5-5 



7 

 43 



2 



17 



3-5 



112-5 



36 



2 



17 



181 



4 

 38 



17 



173 



7 



34 



Total length 



Breadth 



■185 



T 



