NO. 1483. 



UBOCOPTID MOLLWKS—BARTSCIL 



141 



lected by J. H. Ferris, at Cave Creek, Chiricahua Mountains, south- 

 Qiist Arizona, the type localit}', which were donated b\' Dr. H. A. 

 Pilsbry. 



Measurements of Holospira {Bostrichocentruvi) cJiiricalmana. 



The other lot. Cat. No. 173846, U. S. National Museum, contains one 

 perfect specimen and some fragments collected by the donor, J. H. 

 Ferris, at Fort Bowie, Arizona. The perfect specimen has 11 whorls, 

 and measures: length, 9.2 mm.; diameter of eighth whorl, 3.2 mm.; 

 diameter of penultimate whorl, 3 mm. 



LIOSTEMMA, new subgeneric name. 



The species Holosphri {Ilajplostem'ma) mearnsi Dall was given as the 

 type of Ilaplostemma Dall. Holospira Tnearnsi Dall, however, has a 

 subobsolete submedian fold on the axis, running throughout the spire, 

 which places this species in the subgenus Bostinchocentrmn. II. ( Haplo- 

 stemma) hamUtoni Dall would have served better as the type of the 

 group, Avhich is now rechristened Liostemriia.^ having as type IL 

 {Liostemma) hariiilioni Dall. This subgenus is distinguished from 

 Bostrichocentrum by having the pillar smooth, without twist or fold, 

 except in the penultimate whorl, where there is a short, stout, axial 

 lamella. 



HOLOSPIRA (LIOSTEMMA) HAMILTONI Dall. 



There are 8 perfect and 1 young specimen of this species in the 

 collection of the U. S. National Museum, Cat. No. 107759, which were 

 collected by James M. Hamilton, on Selaginella, in the Rio Grande 

 Mountains, Brewster County, Texas, at an altitude of 3,500 feet. 



