EXPLANATION OF PLATES 



Except where otherwise stated, the specimens figured are in the Museum 

 of the Academy of Natural Sciences and were drawn by Helen Winchester. 

 Figures borrowed from other works have been copied photographically. 



FIGURE PAGE 



Plate 1. {Orcula) 



1-3. Orcula doliuru (Drap.) . Lyons. 22679 7 



4. Orcula dolium f. obesa (Branc). After Kobelt .... 9 



5. Orcula dolium var. implieata (Branc). After Clessin. 12 



6. Orcula dolium triplicata (Branc). After Clessin . . 9 



7. Orcula dolium uniplicata (P. & M.). After Pot. et 



Mich 10 



8. 9. Orcula dolium pfeifferi (Moq.). Grenoble. 22675. 9 



10. Orcula dolium brancsikii (Cless.). After Kobelt .. 10 



11. Orcula schmidtii (Kstr.) 16 



12. 13. Orcula dolium plagiostoma (Sdbg.). 3915 11 



14. Orcula gularis (Rssm.) . Tyrol. 22681 13 



15. Orcula gularis spoliata (Rssm.). Dennberg, Tyrol.. 14 



16. Orcula conica (Rssm.) . 22682 15 



Plate 2. {Orcula). 



1,2. Orcula doliolum (Brug.). Valenciennes. 8267 .. 17 



3. Orcula d. templorum (Ben.). Catania 22 



4. Orcula doliolum (Brug.). Lyons. 22687 17 



5. 6. Orcula d. turcica (Let.). Smyrna. 62491 23 



7, 8. Orcula imbricata (Jick.). Abyssinia. 64108 .... 25 



9. Orcula imbricata (Jick.) . After Jickeli 25 



10, 11. Orcula jetschini (Kim.). Near Mehadia. 114974. 17 

 12, 13. Orcula mesopotamica (Mss.). Biredjik. 140001. 27 



Plate 3. {Orcula) 



1. Orcula scyphus (Pfr.). After Kiister 31 



2, 3, 4. Orcula s. gracus Pils. Chalcis. 8266 36 



5, 6. Orcula s. palatalis Pils. Sert. 139998 33 



7, 8, 9, 10. Orcula s. batumensis (Ret.) . Siwas. 139997. 34 



11, 12, 13. Orcula s. enteroplax Pils. Brussa. 8265 .... 35 



Plate 4 {Orcula) 



1. Orcula raymondi (Bgt.). After Bourguignat 38 



2, 3. Orcula r. trifilaris (Mss.). Kurdschips. 139996. 40 

 4, 5, 6. Orcula r. trifilaris (Mss.). Suran. 115009 40 



(321) 



