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THE AMERICAN NATURALIST. [Vol. XXXVII. 



adult was demonstrated by R. \Y. Tower ('95, page 471), may 

 correspond to these glands and if it does they are certainly renal 

 in function. 



Lithobius possesses malpighian tubules and sections have not 

 demonstrated any connection or passage-way from these coxal 

 glands to the body-cavity. The cup-like depression is lined with 

 columnar gland cells which appear to be in condition to secrete 

 actively. The glands may be secondary characters connected 

 with reproduction for they increase rapidly in number up to adult 

 life and then remain in a condition of comparative equilibrium. 

 There is also the possibility that they secrete a recognition 

 substance. 



The number of pores is certainly very variable, as only 19 out 

 of the 100 examined had them arranged in a bilaterally sym- 

 metrical fashion. 



