H. A. Baylis 
409 
to have been enlarged at the expense of the parenchyme itself, which has 
shrunk, at the same time becoming denser, to form the walls of the honey¬ 
comb “cells.’’ The walls of these cavities still show a few nuclei, but their 
cellular nature is not at all obvious. The ova now contain a definite six-hooked 
embryo, which is surrounded by three membranes: (1) its original membrane; 
(2) a rather thick brownish shell, secreted (by the embryo?) since its embedding 
in the parenchyme; (3) an outermost membrane, usually much crumpled in 
the sections, and staining deeply with haematoxvlin. This seems to be derived 
from the wall of the parenchyme-space, to which it is sometimes still adherent. 
This account of the egg-membranes agrees completely with that given by 
Zschokke (1905) in the case of his 0. rostellata, but, curiously enough, not so 
well with Beddard’s (1914) description of 0. marmosae. In the latter case only 
two membranes were found, apparently corresponding to the first and last of 
the three mentioned in the present form. In Linstowia ameivae, on the other 
hand (described in the same paper), Beddard found all three membranes. 
Abnormal Segment. 
A case of abnormal reduplication of the genital organs in a single segment 
was observed in this species. The segment (PI. XXI, fig. 4), which is that 
immediately preceding the three shown in PL XXI, fig. 2, contains two sets 
of female glands, two genital pores, one on either side of the segment, two 
vasa deferentia and two vaginae. This condition is probably brought about by 
the fusion, or incomplete separation, of two consecutive segments, as is 
indicated by the positions of the two sets of female glands; these are so placed 
that the organs on the left are somewhat in front of those on the right, and 
seem to belong to what would have been the anterior of the two segments. 
This explanation is borne out by the number and arrangement of the testes. 
These show a more or less clear division into two sets corresponding to the 
two segments. There are too many testes for one segment, but not quite the 
full complement for two. (82 were counted, of which about 60 seem to belong 
to the posterior segment, and the remainder to the anterior.) A line drawn 
across the segment in the direction of the dotted line in the figure would 
probably coincide very nearly with the missing division. 
OOCHORISTICA AGAMiE, sp. n. 
Host: Agama sp. Africa. 
Oochoristica truncata (Krabbe, 1879) from Agama sanguinolenta , has 
recently been re-described in detail by Rudin (1916). This author has fully 
substantiated Zschokke's (1905) view (as to which there could not be much 
question) that Krabbe’s “ Taenia " truncata was an Oochoristica. It may also 
be considered fairly certain that Rudin’s species is identical with Krabbe’s, 
since in both cases the host was specifically the same. Hitherto O. truncata 
was the only species of the genus recorded from Agama. My material, however, 
