Nachdruck verboten. 

 Übersetzungsrecht vorbehalten. 



Coxal glands of the Arachnids. 



B. H. Buxton. 



(Cornell medical College, New York.) 



With Plates 1-43 and 7 Fignres in the text. 



Part I. Pulmonate Arachnids. 



Introductiou. 



Limulus has probably in many respects the most primitive 

 arrangenient of the coxal glands among the arachnids. According 

 to Patten each gland consists of four lobes (sacciües), one at the 

 base of each appendage two to five. A short duct connects each 

 lobe with the common duct (labyrinthj, which after a series of com- 

 plicated twists and turns, finally ends in a straight dilated exit tubule 

 or end sac with its outlet just posterior to the base of the coxal 

 Joint of the fifth appendage. In the embryo, lobes are also formed 

 on the first and sixth appendages, but degenerate and disappear in 

 the course of development. 



The arachnids studied for the purpose of this article were the 

 Scorpions, Pedipalps, Spiders, Solifugae and more superficially the 

 Phalangids. In the coxal glands of each of these Orders the same 

 fundamental arrangement as in Limulus can be traced, although the 

 number of the lobes, or saccules, to adopt Bruntz's nomenclature, 



Zool. Jahrb., Supplement XIV. 16 



