C. Strickland 
107 
ingested by the larva whilst feeding. A sporozoite was observed coming 
out of one end of the spore through a small opening. Six minutes later 
the next sporozoite glided out with no perceptible movement, twelve 
minutes later the last was seen to come out after a few slight side to 
side movements in the spore case. The spore case was now empty. 
The sporozoites were watched for some time but did not enter the 
epithelium of the gut (Fig. 32). Fig. 33 shows the relative size and 
form of each stage of the life cycle. 
Fig. 33. Illustrating the relative sizes of the various stages in the life-history 
of Agrippina bona, each stage drawn to the same scale. 
Tcipoonomy. ■ 
Of the families of cephaline eugregarines the parasite above described 
has very little resemblance to those with asymmetrical spores, viz. 
Menosporidae, Stylorhynchidae and Oolicystidae, or to the Acanthospo- 
ridae, which have symmetrical spores but armed with spines. 
It has more resemblances to the Didymophyidae, Gregarinidae, 
Dactylophoridae and Actinocephalidae, all of which have symmetrical 
unarmed spores. Yet these families each possess well-defined charac¬ 
teristics which preclude us from placing the new parasite in any one of 
