Explanation of Plate XLIII. 



Fig. 6. Sijndesus rormitus, lateral view, with last abdominal 

 segment. 

 6a. Sijndesus cornntns, dorsal view. 

 66. „ „ , lateral view of median lobe. 



7. Si/steims carahoides, dorsal view. 



7(f. „ „ , lateral view of median lobe. 



8. Lvcanus cervus, ventral-lateral view of median lobe. 



9. Sinodendron cylindricum, lateral view. 



9a. ,, „ , lateral view of median lobe and 



right lateral lobe. 



Descriptions on pp. 574-576. Explanation of the letters used 

 uniformly on pp. 481-483. 



