156 ME. F. M. CAMPBELL ON CEKTAIN GLANDS IN 



Fig. 1. Fig. 2. 



A. Upperside of left maxilla of Tege- 

 naria domestica, Blackw., immature £, 

 X40. B. One of the gland-openings, 

 X770. 



A. Upperside of maxilla of Tege- 

 naria domestica from the first exuvi- 

 um : ^gland-opening, X 66. B,single 

 gland-opening on above, X770. 



duct, gradually increasing in size, until it terminates in an 

 elongated bulbous point (fig. 3, A). I have been unable to 

 trace any further continuation of the organ ; but in a Lycosa 

 carnpestris, Blackw., where the apertures are of similar form and 

 position, I have found fine filaments, as shown in fig. 3, C, 

 while in some species the ducts are ramose. 



Fig. 3. 



A. Gland from maxilla of Tegenaria domestica attached to inner skin. That 

 marked with an asterisk (*) has its terminal point broken. X 250. 



B. Chitined-gland attached to maxilla of Ciniflo ferox, Blackw.. and, as 

 here shown, is foreshortened, x 250. 



C. Chitined-gland from maxilla of Lycosa campestris. X 250. 



The surface on which the glands discharge their contents is 

 crossed by many interlacing open channels formed by folds in the 

 integument (see fig. 5, E), and which run backwards and down- 



