27"/' (m) Bulletin 39 446 



Page 



Fig. 24. Borsonia cocoensis, n. sp. , Coco Plum, 14 mm 78 



25. Drillia aqucensis, n. sp., Water Cay, height 15 mm 73 



26. Drillia musa, n. sp., Banana River, height 16 mm 74 



27-2S. Drillia musacina, n. sp. , Banana River, height 9 mm 69 



29-30. Glyphostoma moinica, n. sp. , Port Li'-non, height, 



5-75 mm 76 



PLATE 6 (9) 



Fig. I. Mitra Swainsoni Broderip, var. limonensis, n. sp., Port 



Ivimon, height 74 mm 100 



2-3. Cancellaria Plummeri, n. sp., Toro Cays, height 34 mm... 85 



4. Cancellaria toroensis, n. sp., Toro Cays, height 29 mm 84 



5. Cancellaria Mauryte, n. sp. , Cercado de Mao, Santo Domingo, 



height 36 mm 82 



6. Cancellaria Barretti Guppy, slightly enlarged, Banana River. 81 



7. Cancellaria Rowelli Dall, East Grape Point Cr., height 30 mm. 84 



8. Cancellaria dariena Toula, about natural size, Toro Cays 80 



9. Cancellaria Cossmanni, n. sp., somewhat enlarged, Banana R. 81 



10. Mitra longa Gabb, Gatun, height 40 mm loi 



11. Cancellaria Cossmanni, n. sp., somewhat enlarged, Banana R 81 



12. Cancellaria islacolonis Maury, enlarged. Red Cliff- Creek 86 



13. Mitra cf. rudis Gabb, Hone Walk Creek, height 33 mm 102 



14-15. Marginella MacDonaldi Dall, Banana R. , height 28. mm... 95 



16. Marginella mindiensis Cossmann, Gatun, height 9 mm 96 



17. Marginella MacDonaldi Dall, Banana R., height 26 mm 95 



18. Mitra Almagrensis Toula, variety coralliophila, n. var. , Port 



Ivimon, height 17 mm 103 



19. Marginella MacDonaldi Dall, Banana River, height 25 mm.... 95 

 20-21. Mitra poas, n. sp., about natural size, Port L/imon 102 



22. Marginella leander Brown and Pilsbry, enlarged, Gatun 98 



23. Marginella mindiensis Crossmann, Gatun, height 17.5 mm 96 



24. Mitra Almagrensis Toula, variety coralliophila, n. var. , Port 



Linion, height about 17 mm 103 



25. Mitra dariensis Brown and Pilsbry, Bocas del Toro, height 



21 mm loi 



PLATE 7- (10) 



Fig. I. Oliva cylindrica Sowerby, Old Man Sam Creek 88 



2-3. Oliva brevispira Gabb, Red Cliff Creek 88 



