32 
Habitat. — Intestine of man at Sault Ste. Harie, Lake Superior. Type, no. 9713 
U. S. P. H. & M. H. S. 
36 
Fig. 36. — Segment of same showing the uterus. Natural size. (After Veinland, 1861, fig. 19.) 
Fig. 37.— Gravid segment, x 2. (After Leuekart, 1863, 289, fig. 80.) 
Fig 38. — Egg of same. Greatly enlarged. (After Weinland, 1861, fig. 20.) 
The African Tapeworm — TiENIA AFRICANA Linstow, igoo. 
[Figs. 39 to 51.] 
Specific diagnosis. — Taenia ( Taemarhynchus ) (p. 26): Strobila attains 1.4 meters in 
length and is composed of about 600 segments. Scolex unarmed, very small, 1.38 mm. 
broad, 1.03 mm. thick, 0.47 mm. long. Suckers circular, 0.63 mm., lumen 88 // ; 
“apical sucker” 0.16 mm. Segments all broader than long, as follows: Immediately 
back of head, 0.16 mm. long by 1.78 mm. broad by 0.59 mm. thick; anterior seg- 
ments, 1 by 5 by 0.75; 2 by 7 by 1.06; in middle of worm, 3 by 9 by 1.20; terminal 
segments, 7 by 12 to 15 by 1.35. Segments, about 150th segment from head and 2 mm. 
long, are mature; segments 7 mm. long are gravid. Cortical layers to middle layer 
in the proportion of 11:8: 11. Ventral canals 0.43 to 0.82 mm. in diameter, their cen- 
ter bearing the relation of 14: 72: 14 to the transverse diameter of the segment; trans- 
verse canals with diameter ^ as great as the dorso- ventral diameter of the segment. 
Three longitudinal nerves, close to and lateral of ventral canals, the center nerve 
crescentic on cross-section, 0.14 mm. broad, the smaller nerves 70 ju broad. Cal- 
careous corpuscles oval, concentric, 10.4 by 16.9 a, lacking in anterior and mature 
segments, but present in gravid segments, and numerous in terminal proglottids. 
Genital pores irregularly alternate in equator of segment; genital sinus funnel shaped. 
Male organs: Testicles numerous, scattered throughout middle layer, 88 to 114 a> or 
70 to 53 f-i\ vas deferens very convoluted, extending fths across the segment; thickly 
setose cirrus 52 a broad, makes a loop in the cirrus pouch: cirrus pouch pyriform, 
with thick wall. Female organs: Ovary composed of two fan-shaped wings, composed 
of club-shaped tubes centering toward the shell-gland, occupies the 2nd and 3rd trans- 
verse fourths of the segment, and leaves but a narrow proximal and distal margin of 
the segment free; vitellogene gland distal, 1.70 mm. broad by 79 a long; shell-gland 
median, globular, 0.21 to 0.23 mm.; vagina setose, 35 a broad, runs almost straight 
from vulva to the shell-gland, near which it widens into a 0.17 by 0.07 mm. recepta- 
culum seminis; on each side of median uterine stem, 15 to 24 lateral unbranched 
pouches, which are longer than median stem and spread out like a fan. Embry o- 
phore 31 to 39 by 33.8 a, with thick radially-striated shell; hooks of onchosphere, 
7.8 a long. 
Cvsticercus: Enknown. 
Habitat. —Adult in intestine of man. Suspicion has fallen on the zebu as possibly 
being the intermediate host. 
Geogbaphic distribution. — Known only for Langenburg, German East Africa. 
Medical significance, — Unknown. 
