NO. 1483. 



UROCOPTID MOLL USKS—BARTSCH. 



129 



Dr. E. Palmer, at an altitude of 7,200 feet. The following table gives 

 measurements and average of twenty specimens: 



Measurements of IJoluspira {Holospira) palmeri. 



a Type. ' 



HOLOSPIRA rHOLOSPIRA) INFANTA, new species. 



Plate III, fig. 4. 



Shell very small, cylindric, with a short terminal cone. General 

 color bluish white, mottled here and there at widely spaced intervals 

 by dots or streaks of horn color, terminal cone yellow-horn color. 

 Nuclear whorls a little more than two, well rounded, shining, very 

 minutely granulose. Later whorls moderately rounded on the early 

 part of the terminal cone, decidedly flattened on the cylindrical part 

 of the spire. The terminal cone is quite strongly, obliquely, ribbed, 

 while on the cylindrical portion of the spire the ribs become much 

 reduced and are almost obsolete. On the last whorl they are again 

 better developed and pass quite strongly over the slightly angulated 

 periphery and well rounded base into the small uml)ilical perforation. 

 Base yellowish brown. The last whorl is very shortly free; the pari- 

 etal wall is decidedly pinched about one-third to the left of its junction 

 with the outer wall. Outer wall slightly concaved in the middle 

 behind the peristome. Aperture well rounded anteriorly, angulated 

 at the junction of the outer and peripheral wall, the latter sinuous. 

 Peristome somewhat expanded and slightly reflected, white. Internal 

 column slender, hollow, with a slightly submedian, obsolete twist 

 extending throughout the length of the spire. In the penultimate 

 whorl the twist on the pillar is replaced by a strong, thick lamella 



