443 Costa Rica Miocene — Olsson 271 



EXPLANATION OF PLATES 



PLATE 1 (4) 



Page 



Fig. I. Terebra bipartita Sowerby, Saury Creek, height 77 mm 35 



2. Terebra dipartita Sowerby, Middle Creek, height 53 mm. 



3. Terebra cf. haitensis Dall, Sousi Creek, height 37 mm 35 



4. Terebra gatnnensis Toula var., Gatun, height 58 mm 36 



5. Terebra gatunensis Toula, Gatun, height 52 mm.. 



6. Terebra gatunensis Toula, Gatun, height 42 mm. 



7. Terebra spirifera Dall, var. midiensis, n. var., Middle Creek 39 



8. Terebra gausapata Brown and Pikbry, Mt. Hope, height 



34 mm 38 



9. Terebra estrellana, n. sp. Estrella River, height 7.5 mm 40 



10. Terebra gausapata Brown and Pilsbry, Mt. Hope, height 



29 mm 38 



11. Terebra Wolfgangi Toula, Mt. Hope, height 38 mm 37 



12. Terebra Wolfgangi Toula, Mt. Plope, height 26 m.m. 



13. Terebra spirifera Dall, Banana River 37 



14. Conus gracilissimus Guppy, Bocas del Toro 52 



15. Conus tortuosostriatus Toula, Bocas del Toro 49 



16. Terebra estrellana, n. sp., Estrella River 40 



17-18. Terebra Berlinerse Maury, Eoucary Creek 39 



19. Terebra costaricensis, n. sp.. Banana River, height 13 mm... 40 



20. Conus marginatus Sowerby, Red Cliff Creek 51 



21. Conus multistriatus Bose, Water Cay 54 



22. Conus musaensis, n. sp., Banana River 47 



23. Conus multistriatus Bose, Water Cay 54 



24. Conus mussensis, n. sp., Banana River 47 



25- 26. Terebra benthalis Dall, var. bocasensis, n. var., Bocas 



del Toro 41 



27. Terebra pumbriensis, n. sp., Pumbri Creek 41 



