158 



NEW YORK STATE MUSEUM 

 PLATE 9 



Poleumita scamnata sp. nov. 



Page 60 



i Lateral view of a specimen with depressed spire 



3, 5 Three views of an individual with high spire 



4, 7 Two views of an average specimen 



6 Umbilical view, showing the size of umbilicus 

 8 Apical view of a young specimen, showing distinctly the sur- 

 face sculpture of the early volutions. X2 



10 Umbilical view of a specimen with very distinct sculpture of 

 the basal region 



12 Enlargement of the surface. x3 



13 Umbilical view of an older individual, showing the wider 



interval between the revolving lines near the umbilicus. 



14 Apical view of an individual with very sharp revolving and 



indistinct transverse lines. From a gutta-percha squeeze 

 of a natural impression (see fig. 12) 



