410 
Cestode Genus Ooclioristica 
differs to such an extent from Rudin’s description that it evidently represents 
a distinct, though closely allied, species. 
The following account is based to a certain extent on two sets of specimens. 
The first is from Agama sp. from Portuguese East Africa. The preservation of 
these examples is unfortunately somewhat imperfect, and, probably in conse¬ 
quence of this, they have been a good deal stretched and distorted. This would 
account for certain apparent differences from the other and better-preserved 
specimens, which will be mentioned below. They are also hopelessly tangled 
together, so that it is almost impossible to obtain complete specimens. 
The second set was found among the collections in the British Museum, 
bearing the label “ Agama 428. 10. 4. 92.” There is unfortunately no further 
definite information as to the source of these specimens, but it is believed that 
they formed part of a collection from Africa. There can be no doubt that both 
sets belong to the same species; the following description, however, except 
where otherwise stated, is taken from individuals of the second set, the pre¬ 
servation of which is sufficiently good for detailed study by means of sections. 
External features. 
The longest specimen measures 80 mm. in length. The maximum width is 
about 1*5 mm. The cuticle shows the same tendency to form wrinkles and 
irregularities as was observed in 0. zonuri, and there is the same absence of 
the overlapping hinder borders of the segments. The scolex measures 0*45- 
0*65 mm. across, and has no rostellum. The suckers are circular in outline, 
and measure 0*175 mm. in outside diameter. There is a short unsegmented 
neck, but, as in 0. zonuri , it is difficult to see exactly where segmentation 
begins. The anterior segments, as far back as the earliest in which signs of 
the uterus appear, are considerably broader than long. When the uterus 
reaches its full development, they become squarish, and from this point back¬ 
wards they gradually elongate, the posterior segments becoming from two to 
three times as long as broad. The genital pores alternate irregularly, and are 
situated a little in front of the middle of the lateral margin of the segment. 
Internal structure of the Strobila. 
In transverse sections the medulla occupies about one-third of the total 
dorso-ventral diameter. The cuticle, subcuticular layer and parenchyme 
present the same characters as have been described in the case of 0. zonuri. 
Musculature. The longitudinal muscles are very slightly developed. There 
is an inner layer of from 25 to 30 small bundles both dorsally and ventrallv, 
each bundle consisting of about 6 to 8 fibres. At about the middle of the 
thickness of the cortex there is a separate outer layer of still smaller bundles, 
with at most three or four fibres in each, and sometimes the bundle is repre¬ 
sented merely by a single fibre. The same transverse and dorso-ventral fibres 
are present as in the former species. 
