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tiffers from the coelomopore (Hollande, ll) of Eugaster in 

 its greater lengtli and irregular shape. In all the preparations 

 he t endons had no opening at their apex, therefore it is 

 difficult to state positively whether the opening is really 

 absent, or it is closed, and in this case, of course, invisible. 

 Nevertheless, I am of the opinion that it is hardly probable 

 that the hoUow tendons serve for the discharge of the blood, for 

 they are present in such places as well, in which no foamy 

 fluid is secreted e. g. between the coxa and femur. 



In investigating the structure of the wall of the first and 

 second abdominal segments above the tympanal apparatus, 

 there are to be seen on both sides of the body under the 

 hypoderm a sac-shaped gland with very folded walls. Each 

 gland opens in the depth of the fold of the dermal integu- 

 ments between the first and second abdominal segments, 

 where there is a special widened cavity or chamber (fig. 5, 

 Ao, 0). On the anterior wall of this chamber the dermal 

 integuments form an invagination into tlie body-cavity in 

 the shape of a cylindrical tube, also blind at the end (a sort 

 of hollow tendon fig. 6, N). The sac-shaped gland lies chiefly 

 in the first abdominal segment, and from the interior it bor- 

 ders by its posterior part with a narrow muscle-band (fig. 8, 

 M), which presses upon it in contraction. From the exterior 

 the gland is covered by an external membrane (fig. 9, me) 

 containing nuclei; internally to this membrane there is a 

 layer of cubic or cylindrical gland-cells with large nuclei (fig. 

 9, n). From inside the gland is covered with a chitin cuti- 

 cula (fig. 9, c) with a layer of cells of the matrix (derivative 

 of hypoderm) under it (fig 9, nh). From the cuticula there 

 runs a very fine canal (fig. 9 a, 10 d) rnto ech gland-celJ 

 serving as an outlet of the secretion out of the cell into the 

 cavity of the gland which is partly filled with the granules 

 of the secretion in the preparations. 



From the morphological point of view this organ must be 

 referred to the group of sac-shaped Stein's glands. The type 

 of Stein's glands, as it is established by Nassono,v, is charac- 

 terised by the fundamental structural unit of the organ being 

 a complex of two cells, glandular and deferent, pierced by a 

 chitin canal. These two cells lie under the hypoderm which 

 forms in the sac-shaped and in complex glands generally a 

 layer of the so called matrix. 



