PLATE V 



Fig. I — 8. Ibla Sibogae n. sp. 



Fig. I. Maxilla; magnified i8o diameters. 



Fig. 2. Second maxilla; magnified 78 diameters. 



Fig. 3. Male; magnified 36 diameters. 



Fig. 4. Front part of the same male ; magnified -/% diameters. 



Fig- 5- Front part of another male, seen from the dorsal side; magnified 180 diameters. 



Fig. 6. Labrum with palp and mandible in situ, of a male; magnified 180 diameters. 



Fig. 7. Mandible of a male; magnified 440 diameters. 



Fig. 8. Maxilla of a male ; magnified 440 diameters. 



Fig. 9 — II. Scalpellum pollicipedoides n. sp. 



Fig. 9. Animal seen from the left side ; magnified 1 1 diameters. 



Fig. 10. Another specimen; a, the two additional valves of the lower whorl; magnified 



1 1 diameters. 

 Fig. II. Complemental male; a, antennae, c, carina, r, rostrum, .fc, scutum, /, tergum, /, part 

 of the tergum, corresponding with the primary valve; magnified 180 diameters. 

 Fig. 12. Scalpellum aries n. sp. 



Fig. 12. Animal, lateral view; magnified 5,6 diameters. 



Fig. 13. Scalpellum rostratum Darwin. 



Fig. 13. Complemental male; magnified 52,5 diameters. 



Fig. 14. Scalpellum Peroni (Gray). 



Fig. 14. Animal, lateral view; magnified 2,8 diameters. 

 Fig. 14^, Sub-carina; 14^^, Rostrum. 



Fig. 15. Scalpellum uncus n. sp. 



Fig. 15. Animal, lateral view; magnified 5,6 diameters. 



