45^ Costa Rica Miccene— Ols^'-on 279 



Page 



Fig. 10. Petaloconchus sculpturatus H. C. Lea, Water Cay, height 



34 nnn 146 



11. Turritella altilira Conrad, variety costaricensis, n. var., Sousi 



Creek, height 34 mm 151 



12. Turritella gatunensis Conrad, Water Cay, height 36.5 mm 148 



13. Turritella gatunensis Conrad, Wiiter Cay, height 24 mm. 



14. Turritella altilira, variety chiriquiensis, n. var., Red ClifF 



Creek, height 33 mm 150 



15. Petaloconchus sculpturatus H. C. Lea, East Grape Point 



Creek, height, 34 mm 146 



PLATE 15- (18) 



Fig. I. Dentalium uscarianum, n. sp,, Rio Codes, natural size 166 



2-3. Dentalium bocasensis, n. sp., Bocas del Toro, somewhat 



enlarged 166 



4. Astralium brevispinum Lamarck, variety basalis, n. var., Old 



Man Sam Creek, natural size 162 



5. Astralium brevispinum Lamarck, variety basalis, n. var.. Old 



Man Sam Creek, natural size 162 



6-7. Calliostoma castilla, n. sp., Port Limon, slightly enlarged 165 



8. Calliostoma limonensis, n. sp. , Port Limon, about natural 



size 164 



9-10. Calliostoma mancinella, n. sp.. Red Cliff Creek, about nat- 

 ural size 1 64 



11. Calliostoma limonensis, n. sp.. Port Limon, about natural 



size 164 



12. Turbo saltus, n. sp. , Red Cliff Creek, height 17 mm 161 



13. Scaphella costaricana, n. sp., Codes Creek, height 29 mm 100 



14 Ptychosalpinx ? dentalis, n. sp.. Codes Creek, about natural 



size 109 



15. Actseon costaricensis, n. sp.. Banana River, height 19.5 mm. 34a 



16. Chlorostoma costaricensis, n. sp.. Red Cliff Creek, diameter 



16.5 mm 163 



17. Crepitacella limonensis, n. sp. , Port Limon, height 8 mm 143 



18. Ptychosalpinx ? dentalis, n. sp.. Codes Creek, about natural 



size 109 



19. Bursa crassa Dillwyn, Banana River, about natural size 134 



20-21. Acteocina bullata Kiener, variety costaricana, n. var.. Mid- 

 dle Creek, height 10 mm 34a 



