134 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXI. 



HOLOSPIRA (EUDISTEMMA) ARIZONENSIS Stearns. 



There are fourteen fragments and one perfect specimen of this spe- 

 cies in the collection of the U. S. National Museum, Cat. No. 104392, 

 collected by Vernon Bailey in a cave at Dos Cabezas, Arizona. The 

 perfect specimen, which is the type, has 12 whorls ancj measures: 

 Length, 12.8 mm.; diameter of tenth whorl, 4,2 mm.; diameter of 

 penultimate whorl, 3.8 mm. This is the t^'pe of Exidistemma Dall. 



HOLOSPIRA (DISTOMOSPIRA) BILAMELLATA Dall. 



The U. S. National Museum collection contains 35 fragments and 8 

 perfect specimens of this species, Cat. No. 129990, collected by Maj. 

 E. A. Mearns, on the top of Hachita Grande Mountains, New Mexico. 

 This species is the type of '"''Distoinospira^'' Dall. The eight perfect 

 specimens measure: 



Meusuremenis of Holospira (Disiomo.'^pirn) JiUameUala. 



« Type. 

 HOLOSPIRA (DISTOMOSPIRA) MEARNSI Dall. 



There are 6 perfect and 3 fragments of this species in the U. S. 

 National Museum collection, Cat. No. 129991. They were collected 

 by Maj. E. A. Mearns on the top of the Hachita Grande Mountains, 

 Grant County, New Mexico. 



Measurements of Holospira {Distomospira) mearnsi. 



' Typo. 



