HOLOSPIRA, SUBG. COELOSTEMMA. 101 



rapidly contracting above in a short terminal cone; white 

 with a pink or flesh tint, rather profusely dotted and sparsely 

 streaked, and with the apical whorls also fleshy. Whorls 

 19y 2 , the first 2 smooth, corneous-brown, the initial whorl 

 being wider and projecting nipple-like ; succeeding whorls up 

 to about the 9th rapidly widening the cone, but extremely 

 short and slowly increasing in width ; then the shape becomes 

 subcylindric, the girth slowly widening as far as the 3d and 

 4th whorls from the last, which are widest. The last whori 

 is distinctly narrower and tapering, its latter half rounded 

 below, flattened above, and angular at the junction of outer 

 and upper surfaces; produced forward. Sculpture of very 

 fine, close striae on a few whorls succeeding the smooth apical 

 two, the rest of the shell nearly smooth except the latter half 

 of the last whorl, which is sharply, irregularly striate. Aper- 

 ture rounded, with an angle at the junction of upper and 

 outer margins; peristorne expanded, somewhat thickened. 

 Interior slightly ochre-tinted. Column very wide, of the 

 shape of the shell, widest within the 3d and 4th whorls from 

 the last ; sculptured with narrow 7 , spaced riblets, often crenu- 

 late or interrupted, and closely-strewn granules; the sculp- 

 ture obsolete on the upper third of the column and within the 

 last whorl. 



Length 15, greatest diam. of shell 6, of internal column 

 3 mm. 



Sierra Guadalupe, Mexico, at 6,500 ft. elevation (Dr E. W. 

 Nelson) . 



An extraordinary species, with the internal column wider 

 than in any other known form of the genus, and copiously 

 granulose as well as ribbed a modification parallel to what 

 occurs in some forms of Ccelocentrum. While not always as 

 wide as the figured specimen, it apparently never becomes 

 cylindrical and slender like the following species. 



24. H. STREBELIANA Pilsbry, n. sp. PI. 26, figs. 24, 25, 26, 28. 



Shell perforate and rimate, long and cylindrical, terminat- 

 ing above in an extremely short cone with mammillate apex; 

 blue-white or lilac-white, copiously dotted and with a few 



