QQ6 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Pachyholus macrostern us. 



Fig. 3fl. Copulatory legs, anterior view. 

 3&. Same, posterior view. 



3c. One of posterior jjair, anterior-uiedian view. 

 3(?. Same, posterior-lateral ^ iew. 



Plate LII. 



Pachyholus teetus. 



Fig. 1<(. Head and first six segments, lateral view. 



lb. Last segment, lateral view. 



Ic. Leg of male. 



Id. Copulatory legs, anterior view, 



le. Same, posterior view. 



1/. Same, lateral view. 



Ig. Copulatory leg of posterior pair, posterior-lateral view. 



Ih. Same, anterior-mesial view. 



Uadrobolus crassicollis. 



2a. Copulatory legs, anterior view. 



2h. Same, posterior view. 



2c. Same, lateral view. 



2d. Copulatory leg of po.sterior ijair, anterior-lateral view. 



2c. Same, posterior-mesial view. 



2/. Leg of uuile. 



2g. First six segments. 



