ART. 22 



NEW LAND SHELLS FROM MEXICO- — BARTSCH 



rough lines of growth. Aperture broadly pear-shaped with the outer 

 lip decidedly expanded, thickened, and reflected into a disjunct 

 peristome. 



The type, Cat. No. 361962, U.S.N.M., was collected at southeast 

 Monclova, Coahuila, Mexico. It has 16.5 whorls and measures: 

 Length, 20.9 mm.; diameter, 6.3 mm. 



Cat. No. 361963, U.S.N.M., contains 24 additional specimens 

 which yield the following measurements: 



•Type. 



HOLOSPIRA (EUDISTEMMA) PICTA, new species 

 Plate 1, figs. 3, 4 



Shell acicular, bluish-white, with a narrow zone of rusty-brown 

 immediately below the summit. The area immediately behind the 

 aperture is also very dark-brown, the basal portion being a little paler. 

 Interior of aperture brown. Nuclear whorls 2.2, well rounded, with 

 an indication of distantly spaced axial lines of growth which hint at a 

 progressive state of sculpture; that is, the postnuclear sculpture is 

 passing up on the nuclear turns. Postnuclear whorls narrow, the 

 early ones well rounded, the later only moderately so, all appressed 

 at the summit. The first four are marked by decidedly retractively 

 curved, slender axial riblets which are about one-third as broad as 

 the spaces that separate them. The riblets become increasingly 

 less developed from the first to the last of these turns after which 

 they become quite obsolete, so that the following turns are marked 

 only by indications of lines of growth. However, on the last two 



