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 Xai:tilus, 

 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 ^Ir. Averell's. I propose for the new form the name 

 Bulimulus Ragsdalei. It is about the size and form of B. 

 schiedeanus mooreanus AV. 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 6i 



Alt. 22, diam. 10 mill. : alt. of aperture lOJ, diam. 7 mill. 



Color, brownish corneous, somewhat translucent, the riblets opaque 

 white. 



Mr. W. G. Binney writes as folloAvs 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 f " 



Ko specimens showing a transition to B. dealbatus or schiedeanus 

 Avere 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 tlie circumstances of its 

 finding: as follows : 



