164 
The N.Z. Journal of Science and Technology. 
[May 
the erythrocyte, and in these the erythrocytes show a slight distortion in 
regard to their contour. A few young developing forms were observed, 
and were usually situated at the distal end of the erythrocytes, the nuclei 
of which were not displaced. 
The protoplasm of these young forms stains a uniform pale blue, and 
no metachromatinic grains are present. Their nuclei shows no vacuo- 
lation, and no capsules can be demonstrated. Erythrocytes containing 
these young forms show no increase in size. 
Rarely two parasites were encountered in the same erythrocyte. A few 
free forms were found in the blood of one lizard ; these were somewhat 
contracted from their capsule, and their nuclei were spherical, and central 
in position, and showed no vacuolation. The average measurements of 
these free forms were 12-8 g by 4*8 /x, and of their nuclei 3-2 g by 3-2 g. 
Fig. 2.— Haemogregarina lygosomarum in erythrocytes of Lygosoma moco. The figure 
contains unaffected and affected erythrocytes, and one free form. 
Measurements of host erythrocytes :— 
Corpuscles 
Nuclei 
Average Average 
Length. Breadth. 
16T /x 9*8 /x 
6*8 /x 3*5 g 
Measurements of host erythrocytes containing adult parasites :—- 
Average Average 
Length. Breadth. 
Corpuscles .. .. .. .. 17-6 /x 11-2 g 
Nuclei .. .. .. .. 7-0 /x 3-5 /x 
The name proposed for this parasite is Haemogregarina lygosomarum. 
A type slide has been deposited in the Dominion Museum, Wellington. 
Other species of native lizard have been examined for haematozoa with 
negative results, including the spotted lizard (Naultinus elegans), the green 
lizard (Naultinus grayi), the tuatara (Sphenodon punctatus ), and the long¬ 
toed lizard (Dactylocremis granulatus). 
