NO. 1483. 



UROCOPTID MOLL USKS—BA R TSCH. 



137 



Measurements of Holospira {Bostrichocentrum) goldmani. 



a Type. 



In some specimens the part succeeding- tlie terminal cone is the 

 broadest part of the shell, the rest of the spire tapering gradually 

 toward the last whorl. 



HOLOSPIRA (BOSTRICHOCENTRUM) CROSSEI Dall. 



There are 12 perfect and 10 immature and imperfect specimens in 

 the collection of the U. S. National Museum, Cat. No. 1291»89, all 

 collected by Maj. E. A. Mearns, at the highest peak of the Hachita 

 Grande Mountains, New Mexico. The 12 perfect individuals give the 

 following measurements : 



Mtasurements of Holospira {Bostrichocentrum) crossei. 



a Type. 



