NO. nil. PBOCEEDINGS OF TEE NATIONAL MUSEUM. 341 



show. The surface of the freshest specimens has a certain fuzziness, 

 as if, when quite perfect, they would be microscopically hirsute. 



Genus POLYGYRA, Say. 

 POLYGYRA LEVETTEI, Bland. 



Triodopsis leveitei, Bland, Ann. N. Y. Acad. Sci., II, 1881, p. 115. — Binney, Bnll. 

 Mus. Conip. Zool., XI, No. 8, p. 154, pi. i,fig. E, Dec, 1883; Man. Am. Landsh., 

 p. 385, fig. 419, 1885; Bull. Mus. Comp. Zool., XIII, No. 2, p. 36, pi. i, fig. 15, 

 1886.— TuYON, Man. Conch., 2d ser., Ill, p. 143, pi. xxix, figs. 88,89, 1887.— 

 PiLSBRY, Man. Conch., 2d ser., IX, p. 76, 1894. — Ancey, Conch. Exch., II, 

 p. 63, Nov., 1887. 



Triodopiiis leveitei var. thomsoniana, Ancey, Conch. Exch., II, p. 64, Nov., 1887. 



Triodoj^sis levcttel var. orobama, Ancey, Conch. Exch., II, p. 64, Nov., 1887. 



Santa Fe Canyon, near Santa Fc, New 3Iexico, Dr. Levette, Thom- 

 son; near Tucson, Arizona, Cox; Fort Huachuca, Arizona, Dr. Fisher; 

 Huachuca Mountains, Arizona, near the summit of the higher peaks. 

 Dr. Mearns. ^o. 130010, U.S.N.M. 



This species is more of a Polygyra s. s. than a typical Triodojisis. 

 It has the aspect of the former group, and only wants a V-shaped 

 angle to the parietal tooth to satisfy the strict diagnosis. The form 

 mentioned by Binney with a single basal tooth, rather bifid, as repre- 

 sented by his type in the national collection, is pathological and not a 

 real variety. The whorls vary from to 7, rarely less than 6^. The 

 varieties mentioned by Ancey are stated to have only 5J whorls and 

 one hardly bifid basal tooth; var, orobcvna, Ancey, differs from fhom- 

 soniana only by having the aperture somewhat larger and less oblique. 

 I have seen no specimens corresponding to Ancey's description ; none 

 of the si)ecimens from any locality has so few as 5i whorls. 



The species belongs at high altitudes in the New Mexican region and 

 seems to be extremely rare. The surface under magnification shows 

 minute irregularities approximatelj^ in harmony with the lines of 

 growth; the striation is feeble and the general appearance of fresh 

 specimens is polished dark yellowish brown. The variety without 

 teeth mentioned by Binney is a distinct si^ecies. 



POLYGYRA CHIRICAHUANA, Dall. 

 (Plate XXXII, figs. 9, 10, 12.) 

 Polygyra chiricahitana, Dall, Proc. U. S. Nat. Mus., XVIII, p. 2, 1895. 



Shell depressed, thin, polished, of a dark brownish color, 5^ whorls, 

 sculptured only with fine incremental lines; suture distinct, the inter- 

 vening whorls moderately rounded ; periphery rounded, the termination 

 of the last whorl constricted behind the lip and moderately descending; 

 umbilicus deep, narrow, showing a small part of the penultimate Avhorl 

 near the aperture; aperture oblique with a narrow, strongly reflected 

 lij) of a livid whitish color, the pillar and outer lips connected in fully 



