260 



B. H. BuxTON, 



ing-, and may or may not be filled witli products of secretion 

 (photos 50 and 52 SL). The lining cells vary somewhat in different 

 parts of tlie sac, but all are of tlie fundamental type of a secretin^ 

 cell; tliose in the diverticulum leading to the collecting tubule being 

 filled with basophil granules (photos 50, 51 DSL), reserabling very 

 closely those of the cells of the modified part of the labyrinth in 

 the typical nephridium (diagram E L3I, and photo 47 LM) of 

 which modified part the entire sac is probably a gigantic extension 

 and further modification. A comparison of the basophil granules in the 

 diverticulum (DSL) of the salivary gland, with those in the modified 

 part (LM) of the typical nephridium, and of the short tubule of 

 the small modified nephridia is made in photographs 54, 54 a, 54 b. 

 Not far from the collecting tubule and ventral to it (diagram F 1) 

 the sac opens into a tubule lined with striated cells (photo 53 CL) 



Diag-raui F. 



Comparison between the salivary gland of 1. Peripatus and the coxal gland 

 of 2. the solifugae. 



The figures refer to the parts correspouding to those of the typical nephridium 

 in diagram G 1. 



i Saccule. 2 Collecting tubule. -5 Missing. 4 Labyrinth sac. 5 Striated 

 part. 6 Missing 7 Exit tubule. 





