Costa Rica Miocene — Oi.SvSon 275 



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4. Oliva brevispira Gabb, var. Giraudi Cossmann, Middle Creek. 88 



5. Oliva gatunensis Toula, Gatun 89 



6-7. Oliva Sayana Ravenel, var. immortua Pilsbry and Brown 



Banana River 89 



8-9. Oliva mancinella, n. sp.. East Grape Point Creek 91 



10. Ancillaria aquaensis, n. sp., Water Cay. 94 



II Olivella muticoides Gabb, East Grape Point Creek 92 



12-13. Oliva testacea Lamarck, var. costaricensis, n. var., Banana 



River 90 



12. Olivella muticoides Gabb, Red Cliff Creek 92 



15-16. Olivella Boussaci Cossmann, var., Banana River 93 



17-18. Olivella muticoides Gabb. Red Cliff Creek 92 



19-20. Olivella limonensis, n. sp,. Port Limon 93 



21. Marginella avena Valenciennis, Banana River 97 



22. Olivella Goliath, n. sp.. Red Cliff Creek 92 



23. Olivella Goliath, n. sp., Banana River 



24-25. Olivella limonensis, var., bocasensis n. var., Bocas del 



Toro 94 



26-27. Marginella collina, n. sp., Banana River 97 



28. Marginella avena Valenciennes, Port Limon 97 



PI.ATK 8. ( |j) 



1. Fasciolaria MacDonaldi, n. sp. , Banana River, height 70 mm. 106 



2. Voluta Alfaroi Dall, Banana River, height 63 mm 99 



3. Solenosteira chiriquiensis, n. sp., Water Cay, reduced 114 



4. Latirus taurus, n. sp., Toro Cay, slightly reduced 108 



5. Fusus miocosmius, n. sp. , Bocas del Toro, height 100 mm 103 



6. Fusus honensis, n. sp., Hone Walk Creek, height 63 mm ..... 104 



7. Solenosteira Vaughani Dall, variety medioamericana, n. var. 



Toro Cays 1 13 



8. Solensoteira Dalli Brown and Pilsbry, Gatun, slightly en- 



larged 113 



9. Fasciolaria Gorgasiana Brown and Pilsbry, Rio Betey, height 



39 mm 105 



10. Latirus infundibulum Gmelin, Punibri Creek, slightly re- 



duced 107 



11. Peristernia insula, n. sp.. Water Cay, height 23 mm 110 



12. Latirus irazu, n. sp., Port Limon, height slightly reduced 107 



13. Peristernia tortugera, n. sp. , Port Limon, height 29 mm 110 



