52 LECTURE IV. 



a gullet, which bifurcates in the neck to form the two longitudinal 

 canals. Eschricht could not detect the transverse anastomosing 

 canals. We shall be justified, perhaps, by the analogy of this species 

 of Bothriocephalus from the Python *, in which I succeeded in 

 injecting with quicksilver both the longitudinal and transverse canals, 

 in concluding that the anastomosing channels are present at the 

 posterior margins of the segments in the Bothriocephalus of the 

 human species. 



Innumerable and very minute nucleated cells are apparently dis- 

 seminated through the tissue of the Bothriocephalus. Eschricht 

 points out their analogy to the blood-cells in the lower animals, but 

 could not perceive any ramified system of blood-vessels. 



At the deepest part of each segment there is a stratum of whitish 

 granules or glands {Jig. 26. «, «), composed of a cluster of minute blind 

 26 sacculi, filled with opake fluid, each 



^ Jk '] J ^ ^^.^ j_,.^ group or gland being suspended in a 



I' ""' ^^^^^^^p^^^^^!^^^^. separate cell, the pedicle of which is, 

 , without doubt, the duct of the saccu- 



r tated gland which Eschricht regards 



\_,^^N^ as a testis, and estimates at 400 in 



. — ' "^'^"'^^"^ " ^— ^ number at each joint. Their ducts 

 Bothr. latus. unite to fomi a network, having 



the capsules of the gland in the interspaces. The vas deferens 

 (Jiff' 26, b) is best seen on the dorsal aspect of the joint, along 

 the middle of which it runs in close transverse folds, progressively 

 increasing in breadth, until it terminates in a pyriform seminal re- 

 ceptacle or " bursa penis " (Jff. 26, c). From this bursa a small 

 lemniscus is protruded through the anterior of the two generative 

 pores, situated upon the eminence near the middle of the anterior 

 part of the ventral surface of the segment. 



The ovaria (Jig. 26, d) are situated near the posterior margin of the 

 segment. They consist of two large transversely oblong lobes, and a 

 smaller median annular portion. They are composed of tubes in which 

 the small germinal and vitelline rudiments of the ova are arranged in 

 rows. The oviducts terminate in a long tubular uterus (Jiff. 26, e), 

 which is considerably wider than the vas deferens, and advances for- 

 wards, making many transverse convolutions, the two last being wider 

 than the rest, and extending on each side of the bursa penis. The ducts 

 of a very complicated series of glands communicate with the uterus 

 before its final termination at the vulva or pore, which is behind the 

 male opening. The glands just alluded to form a stratum next 



* Prep. No. 846. A. 



