326 PROCEEDINGS OF THE ACADEMY OF [NoV. DeC, 



New Mexico: Stations 38, 42, 45, 51, 57 in the Mogollon Moun- 

 tains, abundant. 



ENDODONTID^. 



Gonyodiscus cronkhitei (Nc). 



Arizona: Gosper's pasture, 11,000 ft., and rim of the Blue Moun- 

 tains, 12,000 ft., Graham Co.; Blue River, Station 29 (1914), Green- 

 lee Co. White Mountain Camp at Mt. Thomas, 13,500 ft., Apache Co. 



New Mexico: Stations 36, 42, 45, 46, 57 in the Mogollon Moun- 

 tains, abundant. 



Radiodiscus millecostatus Pils. & Ferr. 



Arizona: Little Blue River, Greenlee Co.; Gosper's pasture and 

 Station 59, head of "hot air trail" rim of Blue Mountains, 12,000 ft., 

 Graham Co. ; Reservation Creek, Apache Co. 



New Mexico: Station 45, Willow Creek, Mogollon Mountains. 



Helicodiscus arizonensis (P. & F.). 



Arizona: Gosper's ranch, on the Blue River, 5,060 ft. 

 New Mexico: Stations 36, 42, 55, 57, Mogollon Mountains. 



Punctum conspectum (P>ld.). 



Arizona: Station 75 (1913), Thomas Peak, Apache Co. 



New Mexico: Willow Greek, Mogollon Mountains, at Station 

 45 (1914). 



These shells appear to be somewhat more glossy than the Cali- 

 fornians compared, the spiral striation better developed, and the 

 riblets irregularly developed; yet we would hesitate to separate the 

 specimens from this widely spread west coast species." 



Punctum pygmaeum (Drap.)- 



Arizona: Station 70 (1913), Black River near the Horseshoe 



bend; somewhat abundant. This is the first record of the species 



for Arizona. 



ZONITID^. 



Polita hammonis electrina (Gld.). 



Arizona: Station 80 (1913), Black River. One example. There 

 are no spiral striae. 



Polita indentata umbilicata (Ckil.) . 



Arizona: Blue River at Gosper's ranch, 5,060 ft., and Stations 



'^ A form of this species was collected in great numbers about bushes in a 

 meadow at the west end of Oswego, Clackamas Co., Oregon, by Mr. John A. 

 Allen in 1913 and 1914. It differs from typical P. conspectum by the larger size 

 and decidedly higher, conic spire, and may be called Punctum conspectum alleni. 

 The tvpe measures, alt. 1.7, diam. 2.3 mm. (No. 111,413 a, A. N. S. P.). A specimen 

 of P. conspectum received from Bland measures, alt. 1.25, diam. 2.1 mm. — H. A. P. 



