50 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 95 



Riljs per whorl 



Greatest 16 19 18 19 



Least 13 14 14 14 



Average 14.8 16.5 16.2 16.8 



No. of Height 



whorls in mm 



Greatest 8.4 8.4 



Least 5-2 6.0 



Average 6.46 7.08 



Diameter 

 in mm 



3-9 

 30 



3-34 



U.S.N.M. no. 426227 contains 54 specimens collected by Dr.l 

 Mary N. Andrev\^s at Kashing, Chekiang Province, China, 10 of 

 which yield the following rib counts and 40 the following additional 

 measurements : 



Ribs per whorl. 



Greatest 16 19 18 16 



Least 13 14 -13 14 



Average 14-4 i6-2 15.6 15. i 



