144 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXI. 



HOLOSPIRA (HAPLOCION) PASONIS Dall. 



Of this, the type species of the sub^^enus Ilaploclon., the U. S. National 

 Museum collection has 3 lots. Two, Cat. No. 129032, U.S.N.M., the 

 type lot, and Cat. No. 134210,. U.S.N.M., two specimens, were col- 

 lected in Mule Canyon, El Paso County, Texas, at an altitude of 4,000 

 feet, by J. A. Singley. The third lot," Cat. No. 152(342, U.S.N.M., 12 

 specimens, was collected by Dr. T. W. Stanton, at Red Bull Canyon, 

 El Paso County, Texas. The following- table g-iv^es the measurements 

 of the perfect specimens: 



Measurements of Holospira {Haplocion) j.asonis. 



" Type. 

 HOLOSPIRA (HAPLOCION) SEMISCULP7A Stearns. 



There are three specimens in the type lot. Cat. No. 102310, U.S.N.M., 

 which were collected by Dr. T. W. Stanton in the canyon above San 

 Carlos, Chihuahua, Mexico. 



Measurements of Holospira {Haplocion) semisndpta. 



HOLOSPIRA (HAPLOCION) COAHUILENSIS W. G. Binney. 



There are two specimens of this speciesMn the collection of the 

 U. S. National Museum, Cat. No. 91.50, one perfect, the type, and the 

 other a half-grown individual. They were collected by Xantus at 



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