SPINNING ORGANS OF EVAGRUS. 



107 



In my work on Evagi'us, fresh material was used and the best 

 plan was found to be to dissect them in water or very weak alcohol. 

 The abdomen was opened from the dorsal surface, and the liver, 

 rectum and ovaries removed, leaving the translucent spinning 

 glands exposed to view. 



There are only two pairs of glands in both males and females, 

 one pair for each pair of spinnerets, as shown in Fig. i. The 



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large pair a, which consists of a cluster of about 100 small piri- 

 form glands has its outlet through the larger or posterior spin- 

 nerets c, and the long gland b consisting of 12-16 piriform glands, 

 bilaterally arranged, belongs to the smaller or anterior pair of 



