NO. 1483. 



UROCOPTID MOLL USKS—BAKTSCH. 



149 



HOLOSPIRA (CCELOSTEMMA) ELIZABETH/E Pilsbry. 



There are 3 lots in the collection, 20 specimens, all from Amula, 

 which has an altitude of about 6,000 feet and lies between Tixtla and 

 Chilapa, in the State of Guerrero, Mexico. The specimens give the 

 following measurements : 



Measurements of Holospiaa [Crelostemma) eUzahethie. 



HOLOSPIRA (CCELOSTEMMA) DALLI Pilsbry. 



There are 76 specimens of this species in the collection of the U, S. 

 National Museum, Cat. No. 188179, which were collected with the 

 type by E. W. Nelson in the Sierra Guadalupe, Mexico, at an alti- 

 tude of 9,500 feet, not 6,500, as stated by Dr. Pilsbry. « The subjoined 

 table gives a list of measurements of 25 specimens selected to show 

 the limits of variations in length, diameter, and number of whorls. 



"Manual of Conehology, XV, 1904, p. 101. 



