136 University of Michigan 



PLATE X 



Sculpture of the Last Whokl in Tudora 



The scale, showTi under fig. 32, indicates a length of one millimeter; 

 the rectangles are all approximately one by one and a quarter millimeters. 



Fig. 28. Tudora aurantia wassauensis. Female cotype, from B8. 



Fig. 29. Tudora rupis rupis. Type, from C2a. 



Fig. 30. Tudora rupis newportensis. Female cotype, from CI. 



Fig. 31. Tudora muskusi muskusi. Type, from C17b. 



Fig. 32. Tudora muskusi grandiensis. Type, from Cl-1. 



Fig. 33. Tudora muskusi bullenensis. Type, from C13. 



Fig. 34. Tudora megacheilos, form desculpta. Type, from C5c. The 

 sculpture of typical megacheilos consists of similar growth cords, which 

 either surmount slightly or extend between the spiral thickenings, which 

 are similar to those shown in fig. 36. 



Fig. 35. Tudora megacheilos spreitensis. Type, from C8. 



Fig. 36. Tudora megacheilos rondeklipensis. Type, from C12a. 



Fig. 37. Tudora fossor fossor. Female cotype, from Cbl7b. 



Fig. 38. Tudora fossor arubana. Type, from A2b. 



Fig. 39. Tudora pilsbryi. Type, from C2a. 



