122 THE NAUTILUS. 
This enables us to add this interesting genus to the fauna of the 
United States. At a more convenient season I hope to describe and 
figure the soft parts and dentition, but at present can only notify the 
conchological world of its discovery and identification. 
A NEW AMERICAN BULIMULUS. 
BY H. A. PILSBRY. 
Some weeks since Mr. Averell, Business Manager of the Nauritus, 
placed in my hands examples of a Bulimulus differing notably from 
all other American species, and which, in his opinion, was new. 
Upon writing to Mr. G. H. Ragsdale, of Gainesville, Texas, from 
whom the first specimens were obtained, I received six more in 
addition to Mr. Averell’s. I propose for the new form the name 
Buuimutus Racspaer. It is about the size and form of B. 
schiedeanus mooreanus W. G. B., but rather more slender and 
elevated. The surface is not smooth, as in other American Bulimuli, 
but strongly ribbed-striate longitudinally. The apex is blunt ; outer 
lip thickened within ; columella reflexed over the narrow but open 
umbilicus. The aperture is less than half the entire height of shell. 
Whorls 62. 
Alt. 22, diam. 10 mill.; alt. of aperture 103, diam. 7 mill. 
Color, brownish corneous, somewhat translucent, the riblets opaque 
white. 
Mr. W. G. Binney writes as follows of the specimens submitted to 
him: | 
“There is in my mind no doubt of their deserving a specific 
name—unless, indeed, you are in possession of examples showing a 
gradual change from the usual sculpturing to these ribs. It is not 
often one gets so interesting a form to describe! Is it not nearer to 
dealbatus than Schiedeanus ?” 
No specimens showing a transition to B. dealbatus or schiedeanus 
were found; nor have I ever seen any, although I have collected 
thousands of Bulimuli in Texas and examined many hundreds more 
collected by Singley, Sampson and others, from Kansas and Arkansas 
to the Rio Grande. Mr. Ragsdale writes me the circumstances of its 
finding as follows: 
