86 
INTERNAL ANATOMY. 
Calcareous corjmsdes are present. mo]*e commonly noticed in the 
anterior part of the strobila. are of variable size and form, but gener- 
ally oval, measuring 8 to 13 j-i by d to 6 )i (lig. 71). 
Nervous system. — Two prominent Jong ituclinal nerve trunl's extend 
Fig. 75. — Proglottid of H. dtminuta showing male organs: c. p., cirrus pouch: t.. testis: r. de/.. vas def- 
erens; ves. sem., vesicnla seminalis. Enlarged. (After Grassi. ISSSl. pi. 11. fig. 10.) 
Fig. 76. — Proglottid of IT. diminuta shotting female organs: or., ovary; rec. nan., receptaculnm semi- 
nis; vag., vagina; y. g.. yolk gland. Enlarged. (After Grassi, ISSSl. pi. 11. fig. 10.) 
throughout the strobila, one on each side, situated a short distance 
laterad from the excretory vessels. Two small accessory Jongituclinal 
nerves are also present on each side, lying close to the dorsal and 
ventral sides, respectively, of the main lateral longitudinal nerre. In 
79 
Fig. 77. — Proglottids of K. diminuta showing usual, A, and nnusual, B, position of testes. Enlarged. 
(After Grassi, 18881, pi. 11. fig. 14.) 
Eig. 78.— Portion of strobila of K. dim in ida abont 4 cm. from the head. Enlarged. ( After E. Parana, 
1884. fig. 5.) 
Fig. 79.— Portion from the middle of strobila of H. diminuta. Enlarged. (After E. Parana, 1884, 
fig. 6.) 
each segment also, according to Zschokke (1SS9), the lateral trunks 
give off in the anterior and posterior regions of the proglottis, 
respectively, two nerves which run mediad, one in the cortical portion 
of the parenchyma, i. e., outside the layer of transverse muscle libers, 
