NOTES AND DESCRIPTIONS OF SOME PARASITIC HELMINTHS 477 
It was published as a preliminary report pending the arrival of an opportunity 
for a more detailed study of the parasite by the author. Nybelin places the 
material which comes from the same species of gorilla, and is probably iden- 
tical with our own, in the genus Anoplocephala s. str., giving it the name A. 
gorillae. It is evident from his description that the material on which his study 
was made possessed segments which had reached the stage of maturity in 
which fully-developed eggs were present. The study of our material has not 
brought out any considerable deviation from Nybelin’s description, but there 
are two points of major interest on which I am unable to confirm Nybelin’s 
observation. Nybelin describes the ovary as consisting of a ventral stem, 
transversely directed, from which there arise individual groups of follicles. 
These follicles are figured lying ventral to and unconnected with the uterine 
stem. This condition, as indicated in the account above, was not observed in 
our material in which isolated ovarian follicles are found around the primitive 
uterine tube, occupying almost the entire thickness of the medullary paren- 
chyma. As far as our studies can show, they are unattached to any stem 
that functions as an oviduct. The ovary is a massive structure, more com- 
parable in size to the ovary of Paranoplocephala (= Anoplocephala) infrequens 
(Douthitt, 1915) Baer, 1927, than it is to the rather scanty although extensive 
series of small follicles as described by Nybelin in whose material the ovary 
would seem to be in a condition resembling that found by Southwell (1920) in 
Anoplocephala gigantea (Peters, 1856) (=A. vulgaris Stunkard, 1926). It is pos- 
sible, however, that the difference in the structure of the ovary in Nybelin’s mate- 
rial and in my own is to be charged either to the mode of fixation of the material 
or to the stage of development of the organ rather than to any specific differences. 
The second point of difference to be noted concerns the absence in our 
material of a spinous condition of the cirrus organ. ‘These two points of dif- 
ference would seem to be of minor significance and may perhaps vanish when 
Nybelin publishes a more comprehensive account of his material. 
Cysticercus pisiformis (Bloch, 1780) Gmelin, 1790 
In two of four specimens of the “topi’? (Damaliscus corrigum jimela) several 
cysticerci or larval tapeworms were found. ‘The parasite occurred both on the 
surface of the liver and in adventitious cysts on the mesentery. Dissection 
of the cysts which were somewhat calcified disclosed a single scolex in each. 
These after prolonged clearing in lactophenol were rendered very suitable for 
study. The scolex (which measured about 1.5 mm. in diameter) is provided 
with four muscular suckers, 250u in diameter. <A rostellum is present on which 
forty-four hooks are mounted in two alternating rows. The larger hooks (270y to 
300y in length) consist of a well-curved blade, a rather straight handle half as long 
again as the blade, and a guard or lateral prong which terminates in a bluntly- 
rounded cone. The smaller hooks measure from 150 to 156u in length. The 
blade is even more strongly curved than in the larger hooks; the handle which, 
seen from the lateral aspect, terminates in a slightly swollen rounded knob, 
is about half the size of the blade; the guard tapers toward its extremity and 
