go University of Michigan 



Plate IV 



Sll>hono['hora rclicia, sp. nov. 

 Fig. 24. A left plenrite from posterior region, x 75. 



Slphonophora guianaua. sp. nov. 



Fig. 25. Anterior end, dorsal view, x 30. 



Fig. 26. Left plenrite of anterior region. y^~6. 



Fig. 27. Left plenrite from posterior region, x 75. 



Siphoiiotiis parvus, sp. nov. 



Fig. 28. Head and collnm from in front. xii2. 

 Fig. 29. Candal end, from above, x 75. 



