Costa Rica Miocene — Ols~ow 277 



Page 



8. Strombina coslaricensis, n. sp. , Middle Creek, height 15 mm 128 



9. Strombina ambigua Guppy, Banana River, height 26 mm 126 



10. Metula Harrisi, n. sp., Coco I'kim, height 27 mm 116 



11. Metula Gabbi Brown and Pilsbry, Mt. Hope, height 28,5 mm 115 



12. Metula cancellata Gabb, Bocas del Toro, height 18.5 mm 115 



13. Strombina Lessepiana Brown and Pilsbry, Gatun, height 



25 mm I 26 



14. Strombina chiriquiensis, n. sp : 130 



15. Typhis alatus Sowerby, Toro Cays, height 23 mm 132 



16-17. Strombina costaricensis, n. sp , Middle Creek 128 



18. Strombina cricamola, n. sp , Water Cay, height 16 mm 127 



19. Strombina sincola, n. sp., Banana River, height 7 mm 129 



20. Strombina Lessepiana Brown and Pilsbry, Gatun 126 



12. Strombina sincola, n. sp., Banana River, height 7 mm 129 



22. Typhis linguliferus, variety costaricensis, n. var., Bannan R. 132 



23. Sistrum nodulosum C. B. Adams, Red Cliff Creek 133 



24. Strombina chiriquiensis, n. sp 130 



25. Marginella musacina, n. sp. , Banana River 98 



26-27. Strombina costaricensis, variety musanica n, var. Banana R 129 



28. Cerithium costaricensis, n. sp., Red Cliff Creek, height 



28 mm 143 



29. Typhis linguliferus, variety costaricensis, n, var.. Banana R. 132 



30. Clava alajuela, n sp., Middle Creek, height 17 mm 145 



31-32. Drillia estrellana, n. sp., Estrella River, height 7.50 mm... 69 

 33-34. Columbella submercatoria, n. sp., Red Cliff Creek 125 



PLATE II (!4) 



I. Xancus scopulus, n. sp., Banana River, height 265 mm iir 



plate: 12 (15) 



1. Serpulorbis papulosa Guppy, Banana River 145 



2. Malea elliptica Pilsbry and Johnson, Banana River, height 



63 mm 139 



3. Sconsia laevigata Sowerby, variety Gabbi, n. var., Toro Cays, 



slightly enlarged 136 



4. Siliquaria modesta Dall, variety limonensis, n. var., Port 



Limon, somewhat enlarged 147 



5. Siliquaria modesta Dall, variety limonensis, n. var., Port 



Ivimon, slightly enlarged 147 



