1921] 



NATURAL SCIENCES OF PHILADELPHIA. 429 



Explanation of Plates XVI-XLVII. 



Drawings, photographs and retouching by Helen Winchester. The line figures 

 in the text were drawn by the author. 



Plate XVI. — Fig. 1, 2. — Drillia maciletUa Dall. Length 37.5 mm. and 44 mm. 

 Fig. 3. — Drillia consors Sowb. Length 41.5 mm. 

 Fig. 4, 5. — Drillia squamosa Gabb. Type. Length 56.5 mm. 

 Fig. 6. — Drillia callistopleura Pils. & Johns. Type. Length 22.4 mm. 

 Fig. 7, 8. — Drillia, winchesterae n. sp. Type. Length 26.3 mm. 

 Fig. 9. — Drillia elocata n. sp. Type. Length 25.4 mm. 

 Fig. 10, 11. — Clathurella gracilis Gabb. Type. Length 28.3 mm. 

 Fig. 12. — Drillia callistura Gabb. Type. Length 21.7 mm. 

 Fig. 13. — Drillia mimula Pils. & Johns. Type. Length 16.7 mm. 

 Fig. 14. — Drillia subgibhosa Pils. & Johns. Cotype. Length 46 mm. 

 Fig. 15. — Drillia ischnatracta Pils. & Johns. Type. Length 53.4 mm. 

 Fig. 16, 17. — Drillia scala Pils. & Johns. Type. Length 45.4 mm. 

 Fig. 18. — Drillia esculenta Pils. & Johns. Type. Length 13.2 mm. 

 Fig. 19. — Drillia orthopleura Pils. & Johns. Type. Length 13.7 mm 

 Fig. 20. — Drillia foveolata Pih. & Johns. Type. Length 14.1 mm. 

 Fig. 21. — Drillia parkeri Gabb. Type. Length. 26.8 mm. 



Plate X.YII.—Fig.l.—Turris rara Gabb. Type. 

 Fig. 2. — Surcula longicaudata (Gabb). Type. 

 Fig. 3. — Drillia henekeni (Sowb.). 



Fig. 4, 5. — Surcula humerosa (Gabb). Type and paratype. 

 Fig. 6. — Drillia sororcula Pils. & Johns. Type. 

 Fig. 7. — Drillia gatunensis alia n. subsp. Type. 

 Fig. 8.. — Drillia fusiformis (Gabb). Type. 

 Fig. 9. — Cythara hepiagona (Gabb). Type. 

 Fig. 10. — Cythara polygona (Gabb). Type. 

 Fig. 11, 12. — Clavatula labiata Gabb. Type and paratype. 

 Fig. 13. — Clathurella arnica Pils. & Johns. Type. 

 Fig. 14. — Drillia venusta (Sowb.). 

 Fig. 15. — Glyphostoma dentiferimi Gabb. Type. 

 Fig. 16. — Scobinella magnifica (Gabb). Type. 



Fig. 17, 18. — Scobinella iristis Pils. & Johns. Back and face of type. 

 Fig. 19, 20. — Borsonia varicosa Gabb. Views of opposite sides of the sum- 

 mit of a quite perfect paratype. 

 Fig. 21. — Borsonia varicosa Gabb. Type. 



Plate XVIII. — Fig. 1. — Drillia hexapleura Pils. & Johns. Type. No. 2908. 

 Fig. 2. — -Borsonia recurvirostris Gabb. Type. Length 9.6 mm. 

 Fig. S.— Cythara elevata (Gabb). Type. No. 3224. 

 Fig. 4. — Clathurella paupercula (Gabb). Type. 

 Fig. 5. — Drillia lissotropis dorsuosa Pils. & Johns. Type. 

 Fig. 6.— Cythara elongata (Gabh). Type. No. 2917. 

 Fig. 7. — Odostomia dulcis Pils. & Johns. Type. 

 Fig. 8. — Anachis (?) quadrata (Gabb). Type. Length 8.7 mm. 

 Fig. 9. — Strombina caribcea Gabb. Type. 

 Fig. 10,11. — Strombiiia caribcea micraVils. & Johns. Type. 

 Fig. 12. — Dentalium sagittarii Pils. & Johns. Type. 

 Fig. 13. — Anachis exilis (Gabb). Type. 



Fig. 14. — Columbella inflata (Gabb). Type. Length 25.6 mm. 

 Fig. 15. — Strombina politissima Pils. & Johns. Type. 

 Fig. 16. — Metulella fusiformis Gabb. Type. Length 18.5 mm. 

 Fig. 17. — Anachis gracilicostata Pils. & Johns. Type. No. 2803. 

 Fig. 18. — Metulella dominicensis Pils. & Johns. Type. Length 16.4 mm 



