308 



Jean SJtavvov 



Fig. 3.) The speniiathecal sac and its diverticulum open to the 

 exterior by a large duct through the stalk. In the last region this 

 passage seems to be furrowed transversely. (Plate XXIX. Fig 1.) 



Associated with the spermathecae are other paired glandular 

 structures. In the sixth segment is found the first pair one on each 

 side. Ihe seventh and eigth each contain two pairs and in the 

 ninth is again a single pair. Ducts from these glands open on 

 either side of the ducts fiom the spermathecae — i.e., between seg- 

 ments six and seven, seven and eight, and eight and nine. (Plate 

 XXVII. Fig. 3.) (Plate XXVIII. Fig. 2.) (Plate XXIX. Fig. 1.) 



The minute structure of these glands is very difficult to deter- 

 mine. Each is decidedly floccular in nature, and the surface, cells 

 are large, nucleated, and more or less regular. Internally the 

 •cells become less granular, smaller and very irregular, but some 

 .still possess very large nuclei, conveiging to the base of the struc- 

 ture there appears to be clear channel-like spaces between the 

 ■cells, and these open to the interior of the ** stalk." There is no 

 definite duct running from the cell mass, but the whole of the stalk 

 appears to become split longitudinally in an irregular and com- 

 plex manner. Finally we get a widening of the passage to form 

 a very conspicuous flask-like opening to the exterior. The sur- 

 rounding epidermal cells become greatly elongated and bow-shaped 

 to surround this structure. In most easels the cuticle is not rup- 

 tured, and this seems to sliow tliat an opening is formed only at 

 intervals, as the duct becomes full of secretion. Plate III., Figs, 

 2, 3.) 



The vesiculae seminales are large, and occupy most of segments 

 •eleven and tAvelve. 



In the eighteenth segment lying tranversely are found two very 

 large organs, the spermiducal glands. Each is flattened dorso- 

 ventrally, and is an elongated oval shape. Passing from the inner 

 end of each is a very stout duct,' which is practically coiled upon 

 itself on its way to the exterior. The vasa deferentia enter this 

 duct separately about mid-way a*long its upper surface. The pros- 

 tate itself seems to be made up of lobes in close apposition to one 

 anothej- . 



Microscopic examination shoAvs little definite structure other than 

 the clusters of cells in a less dense matrix, and transverse sections 

 reveal the fact that the whole gland is traversed by one large duct 

 lined by conspicuously nucleated and very regular cells. 



