396 



"SUCKERS" 



Renette. The renette duct, dct ex, is distinctly refractive and nearly two 

 microns across; it passes inward at right angles to the ventral surface and 

 then turns backward on the left side and becomes narrower and apparently 

 bifurcate. 



Caudal "Suckers." The tissue composing the mouths of the two lateral 

 caudal "suckers" is comparatively structureless looking, and externally par- 

 takes of the general character of the cuticle. These two large lateral open- 

 ings, found on the tail of adults of both sexes, when viewed dorso-ventrally 

 are seen to lead inward and forward into two 

 well developed pockets or "suckers," so massive 

 that this portion of the tail, in the median aspect 

 appears about 50 per cent wider than the portion of 

 the tail immediately behind (Fig. 3, org suci). 

 The cavity of each organ is lined with thick striated 

 tissue whose most obvious elements are arranged 

 at right angles to its inner surface, which presents 

 a very definite internal sectional contour, due to 

 the refractiveness of this tissue; so that the whole 

 organ is a relatively conspicuous affair. A strand 

 (contractile?) leading forward from each "sucker" 

 into the corresponding lateral chord is at first 

 rather wide, then narrows (text org suet, Fig. 3). 

 The "suckers" seem to make their appearance on 

 both sexes at the last moult (Fig. 4). 



Gonads. The elevated transverse vulva ap- 

 parently is not very wide. Near the flexure the 

 gonad presents a spermatheca, spmth, containing 

 numerous spherical sperms of such a size that 

 about a dozen would be required to span the 

 body diameter. These possess refractive, faintly 

 lobed nuclei, indicating the presence of a small 

 number of chromosomes probably about five. 

 Contained in the uterus of adult females, as a gella secta > showin g * n * h e 

 rule, is a single thin-shelled, smooth egg, ov, lower part 

 about one and one-half times as long as the body 

 is wide and about one-third as wide as long. No 

 segmented egg has been seen in the uterus. The blind end of the ovary 

 lies between the caudal "suckers" or somewhat farther forward. From 

 the blind end of the ovary forward the oocytes very soon become smaller, 

 as if by division, and not far from the anus are arranged several abreast, 

 and so continue, increasing meanwhile in size, for a good fraction of the dis- 

 tance to the vulva; thence, owing to increased size, they are arranged single 

 file, each ovum cylindroid and somewhat longer than wide. 



X800 



sir long it 



tf^t org suet 



owyt. 



strJfflff/t 



car org suet 



as org suet ? 



tnaw . . 



Fig. 3. Ventral view of 

 the post-anal region of Un- 



two lateral pockets or suck- 

 ers, cav org suet. 



