ANIMAL PARASITIC INFECTIONS 455 
somewhat calcified, found that the scolex was provided with four muscular suck- 
ers, 250u in diameter; forty-four hooks were mounted in two alternating rows 
on the rostellum. After comparing details in these specimens with those of 
a scolex of Taenia pisiformis from the dog, he believes that the cysticercus 
encountered in these topis conforms well enough with this species tentatively 
to be taken as its larval form. Taenia pisiformis has been recorded from both 
the lion and the leopard which prey upon topi in the locality where we secured 
this material. 
Cysticercus pisiformis has been found previously in the peritoneal cavity 
of rabbits (Lepus cuniculus), hares (L. timidus, L. variabilis) and mice (Mus 
musculus). Vital! reported that he had observed Taenia pisiformis twice in 
the intestine of human beings. However, Galli-Valerio swallowed five speci- 
mens of Cysticercus pisiformis without any evidences of infection. Stiles ? in his 
Key-Catalogue of the Worms reported for Man says the reported presence of this 
parasite in man is subject to confirmation. 
The filariae (Setaria poultont Thwaite) which we encountered in the topi 
were found upon the surface of the liver or in the folds of the mesentery or 
omentum. Many of them were partially calcified. Thwaite*? has recently 
made an extensive study of the genus Setarta. He points out that species of 
Setaria have been found in a number of species of wild game in East Africa, such 
as the buffalo (Bos caffer), bush buck (Tragelaphus scriptus), eland (T'aurotragus 
derbianus), water buck (Cobus ellipsiprymnus), impala (Aepyceros melampus), 
reed buck (Cervicapra arundinum and C. fulvorufula), puku (Cobus vardoni), topi 
(Damaliscus corrigum jimela), hartebeeste (Bubalis lelwel jacksont), kob (Cobus 
thomast), oribi (Oribia oribi), duiker (Cephalophus sp.), and klipspringer (Oreo- 
tragus oreotragus), as well as in the horse, donkey and ox. He lists fourteen other 
species of Setarva and also gives eight additional species concerning which knowl- 
edge is not definite. Nothing is stated about the pathological significance of 
the parasites. From our observations upon infected topi, buffalo and antelope 
in Africa, and upon cattle in the Philippine Islands, Setaria apparently does not 
give rise to any serious pathological condition. 
Thwaite describes Setaria poultont as a new species, he having collected 
and studied one female from the kongoni Bubalis lelwel jacksoni and four 
females and one male from the topi Damaliscus corrigum jimela. He points 
out that by reason of the four smaller lips and the deep depression into which 
the vulva opens, this worm can be easily distinguished from any species of the 
genus Setaria previously described. Our observations are apparently the 
second regarding the infection of this parasite in the topi, and they indicate 
that the infection may be, in some localities at least, of very frequent occur- 
rence in this animal. While Setaria equina (?) infection in man has been reported 
in several instances,‘ Stiles ° (1926) states that its presence in man has been 
questioned. 
1 Vital: Fantham, Stephens and Theobald: ‘Animal Parasites of Man” (1916), p. 338. 
2 Stiles: U. S. Hyg. Lab. Bull. No. 142 (1926), p. 111. § Thwaite: Loc. cit., p. 435. 
4 Fantham, Stephens, and Theobald: ‘Animal Parasites of Man” (1916), p. 408. 
5 Stiles: U.S. Hyg. Lab. Bull. No. 142 (1926), p. 147. 
