381] ANOPLOCEPHALIDJE—DOUTHITT 31 



vesieula seiniualis just beyond the pouch and then proceeding mediad 

 to the receptaculum seminalis. Just before entering the receptaculum 

 it again becomes distinct. Thus in position only does it resemble the 

 conspicuous, glandular vagina of S. anoplocephaloides. The rather 

 small, nearly globular receptaculum seminis lies just anterior to and 

 laterad of the vitelline gland partly overlapping it. 



The female glands are but slightly displaced from the median line. 

 In proglottids 4 to 5 mm. wide the median axis of the shell gland is 

 55//, to 175/a distant from the median line. The female organs of the 

 right and left sides therefore overlap largely. The transverse diameter 

 of the ovary is about 1.3 mm. It is composed of a transverse portion 

 in front of the vitelline gland from which numerous small lobes radiate 

 in all directions except towards the vitelline gland. To either side of 

 the vitelline gland the lateral portions turn distad and extend to near 

 the transverse commissure of the excretory duct. The ova measure 

 12jx to 15/x in diameter. The oviduct is short; its attachment to the 

 ovary is located anterior to the central axis of the vitelline gland. This 

 latter gland is of the regular Anoplocephaline form, being composed 

 of a small lateral and a large median lobe. Here, however, is a clear 

 approach to the peculiar mulberry-like form found in the next species 

 and in S. hagmanni. The two lobes approach each other anteriorly, 

 thus restricting the space between them and making the gland more 

 compact and show an indication of the division of the gland into many 

 small radiating lobes. The transverse diameter of the gland is 400/x. 

 The shell gland is 90/a in diameter; it needs no further description. 



The uterus in the earliest stages observed is a continuous sheet of 

 tissue extending through nearly the whole of the median field, except 

 for the portion occupied by the ovary and vitelline gland. The two 

 lateral portions are connected by a narrow strip above the ovary. There 

 is abundant indication of thickening of the uterine tissue into definite 

 lines, thus simulating a network such as is found in Moniezia. These do 

 not develop into open tubes, however, so it is not really a reticulum. 

 For a discussion of this type of uterus see under 8. anoplocephaloides. 

 The condition of the material unfortunately does not permit the devel- 

 opment of this organ to be worked out in full detail. In its fully devel- 

 oped stage it is divided up into a great many small compartments, each 

 containing several eggs, similar to the condition described later for 

 Moniezia expansa. It seems, therefore, that the uterus does not break 

 down into egg-capsules after the manner of the Linstowinae, but 

 that the condition is due to unequal development of the original cavity 

 at different points. In its fully developed stage the uterus is practically 

 confined to the median field but a small branch extends out to occupy 



