250 
Annals of the Transvaal Museum. 
Between the outermost pair of anterior basal corpuscles a second 
pair of these corpuscles are situated from which arises the Mittelrippe or 
double axial rod. These two axial rods are situated very closely together 
and pass backwards in a straight line. At their ends are situated two 
basal corpuscles from which the tail flagella arise. Finally, near the middle 
of the Mittelrippe, are present two basal corpuscles from which the ventral 
pair of flagella arise. These latter flagella at first run parallel to each other 
in serpentine fashion, but towards their termination they diverge. 
There still remains to be mentioned the curious body situated immedi- 
ately under the site of origin of the ventral flagella. This corpuscle has 
an irregular form, but shows a fibrillar structure as seen in other Lambliae, 
Thus our Lamblia sanguinis differs from other known Lambliae in 
the peristome area, being first, smaller ; second, it is in part bordered 
by the fibrils connecting the nuclei to the basal corpuscles, from which 
arise the antero-lateral pair of flagellae. Also the nuclei are situated very 
close to the sides of the organism. 
Encystment could not be proved. 
