Plate 20. 



Pago- 



Fig. 1. Cadulus cucurbiius Dall. Type, 4 mm 146 



2. Cadulus at lanticm, new species. Type, 4.9 mm 137 



3. Cadulus dojninguensis Orbigny. 7 mm. Copy of Orhigny's figures . . . 141 



4. Cadulus tersus, new species. Type, 3.1 mm 149 



5. Cadulus podagrinus, new species. Type, 4.5 mm 148 



6. Cadulus ampullaceus Watson. 2 mm. Copy of Watson's figures 144 



7. Cadulus curtus Watson. 2.5 mm. Copy of Watson's figures J42 



8. Cadulus obesus Watson. 2.7 mm. Copy of Watson's figures 146 



9. Cadulus exiguus Watson. 1.9 mm. Copy of Watson's figures 145 



10. Cadulus congruens Watson. Copy of Watson's figures 142 



11. Cadulus acus Dall. Type, 8 mm 140 



12. Cadulus halius, new species. Type, 5.5 mm 149 



13. Cadulus acus Dall . Apical portion 140 



14. Cadulus platensis, new species. Type, 5.5 mm 147 



15. Cadulus cylindratus, Jeffreys. 7 mm 139 



157582°— 20 12 171 



