36 
Journal of Agricultural Research 
Vol. I, No. x 
bifid, at the same time twisted so that the lateral axis tends to lie in the 
plane of the blade and dorsal root. 1 
The genital papillae are small and inconspicuous in T. brachysoma and 
the genital sinus measures not over 170/4 in maximum depth. The lat¬ 
eral branches of the uterus number only 10 to 12 on each side of the 
median stem. 
Taenia krabbei Moniez (1879c, pp. 161-163; 1880a, pp. 44-50, 56, pi. 1, 
figs. 12-14, pl* 2 > figs. 4-7) produced in a dog by feeding cysticerci from 
the muscles of reindeer is described as much longer, wider, and thicker 
than T. coenurus and T. serrata and has much wider segments propor¬ 
tional to their length, but its head is more delicate. It is also much 
larger than T. marginata , the head is larger, and the segments are wider 
in proportion to their length. The genital pores are located in large 
papillae, often attaining a diameter of 1 millimeter, equal to the length 
of the contracted segment. The cysticercus according to Moniez is 
much smaller than the cysticercus of T. solium . The number of hooks 
varies from 26 to 34. The caudal vesicle, compared to the size of the 
head and neck, is very slightly developed and does not contain much 
fluid. The orifice of invagination of the cysticercus may be either at 
one pole or at one side. The invaginated head and neck commonly curve 
spirally as in Cysticercus cellulosae , but to a less degree. The size of the 
hooks is not given by Moniez. 
If the stated magnification of a drawing by Moniez is correct, the 
length of the large and small hooks would be about 215/4 and 160/4, respec¬ 
tively, but inasmuch as the large hooks of C. tenuicollis , shown in another 
drawing, measure, according to the magnification given, about 350/4 in 
length, whereas the maximum recorded length is less than 250/4, it is 
not unlikely that there has been some error also in stating the magnifi¬ 
cation of the drawing of the hooks of T. krabbei , so that sizes calculated 
from the magnifications of Moniez's drawings can not be considered at 
all accurate. Cysticerci in the Bureau of Animal Industry Helmintho¬ 
logical Collection found in reindeer in Alaska by Dr. D. S. Neuman and 
corresponding to T. krabbei , so far as may be determined from Moniez’s 
description and figures, except as to the size of the hooks, have hooks 
(fig. 6) of the following dimensions: Targe hooks 150 to 170/4 in length, 
average 162/4, with blades 75 to 80/4 long, average 77/4; small hooks 85 
to 120/4 in length, average 107/4, with blades 52 to 60/4 long, average 57/4 
(measurements based on 34 large and 34 small hooks from 8 cysticerci). 
The average size of the hooks is thus less than the average of the hooks 
in C. ovis, but they show no remarkable difference in form from those 
of the latter. Corresponding closely to Moniez's findings, the number 
counted on eight heads varied from 26 to 32. The invaginated head and 
neck of the cysticercus form a much larger structure than in C. ovis both 
actually and relatively to the size of the caudal bladder. On account of 
1 Setti does not make it clear whether this twisted condition is invariably present. The small hooks of 
Taenia hydatigena commonly present a similar appearance after subjection to the pressure of a cover glass. 
