(act NAeeius. 
Vor. XII. DECEMBER, 1898. No. 8. 
DESCRIPTIONS OF NEW SPECIES AND VARIETIES OF AMERICAN 
ZONITIDZ AND ENDODONTIDA. 
BY HENRY “ASSPIESBRY: 
Pyramidula Cockerelli n. sp. 
Shell having the general shape of P. striatella; thin, greenish, 
more or less streaked and dotted with light yellow; a little shining, 
very irregularly wrinkle-striate, some specimens unequally ribbed 
in places above and at the margin of the umbilicus. Spire convex, 
the first whorl a little protruding. Whorls 41, the first whitish- 
corneous and glabrous when unworn, the rest convex, regularly 
widening, separated by a deep suture; last whorl obtusely angular 
at the periphery in front, becoming rounded on its later portion ; 
base well rounded, the umbilicus showing all the whorls, its width 
contained about 3.7 times in that of the shell. Aperture oblique, 
rounded, the penultimate whorl cutting out a segment of about one- 
fourth the whole circle of the thin and simple peristome; the 
ereatest diameter of aperture contained about 2.4 times in that of 
the shell. 
Alt. 2.8, diam. 5.5 mm. (specimen from New Mexico). 
Alt. 3.2, diam. 6.5 mm. (specimen from Colorado). 
This species is based upon a series of shells from Labelle, Taos 
County, New Mexico, collected by Rev. E. H. Ashmun, and speci- 
mens from Custer and Saguache Counties, Colorado, collected by 
Prof. T. D. A. Cockerell. It is what has been very generally 
known as Patula Cronkhitei Newe.; but reference to co-types of 
