80 THE X ALT ILL' 6. 



apart, but are doubtless distinct. P. v. alabamensis and another 

 variety, with decidedly wider umbilicus, but still unnamed, replace 

 typical vannostrandi in Alabama. Neither is so distinct as to be 

 startling. 



Polygyra fallax is common in southeastern Pennsylvania, and 

 extends south to the Carolinas at least. Specimens taken by Messrs. 

 Henderson, Walker, Clapp and myself at Smith's Island, Cape Fear, 

 are much smaller than Pennsylvanian shells. In the western part 

 of the Ozark region the closely related and still smaller P. cragini 

 (Call) occurs, being widely separated from all parts of the range of 

 P. fallax. 



"When collecting fossils in Florida in 1900, Mr. C. W. Johnson 

 found a peculiar variety which seems referable to fallax, and which 

 I think is worthy of a name. 



Polygyra fallax goniosoma n. subsp. The shell differs from P. 

 fallax by being distinctly or strongly angular in front, the angle 

 being situated high on the whorl. Sculpture of rib-strise stronger 

 above the angle, the strise becoming smaller below it, and usually 

 more numerous by intercalation of strife. Aperture as m fallax, the 

 outer lip retreating, outer lip-tooth broad and deeply placed, ba,«al 

 tooth buttressed on the columella side, parietal tooth angularly bent. 



Alt. 7, diam. 12.4 mm.; whorls 5^. 



Alt. 6.2, diam. 10.3 mm.; whorls 5^. 



Blountstown, Calhoun Co., Florida, under oak logs in oak and 

 pine woods, collected by C. W. Johnson, 1900. Cotypes no. 77948 

 A. N. S. P. 



This form may possibly be referable to P. vannostrandi, but in the 

 number of whorls it agrees better with P. fallax. 



MOLLUSCA FROM NORTHERN NEW MEXICO. 



BY JUNIUS HENDERSON. 



In 1910, while engaged in ethno-zoological work for the School 

 of American Archasology, at its summer camp in the canyon of El 

 Rito de los Frijoles, about thirty-five miles northwest of Santa Fe, 

 New INIexico, and also in the near-by Jemez Mountains, near Valle 

 Grande, I collected the following species of moUusks: 



