THE NAUTILUS. 41 



mellar end of the peristome. The umbilicus is ample and deep, and 

 shows the base of the first whorl prominently at the bottom : enlarged a 

 little at the mouth by the deviation of the last whorl. 



Alt. 5^, diam. 12^ mm. (Eureka Springs). 



Alt. 4-^r, diam. 1(H mm. (Springfield). 



This is a very constant and easily recognized form, without the 

 keel on the face of the basal lip of vultuosa, the dark color, fine 

 striation and raised spire of Oragini, and differing from both and 

 from the large P. frauduhnta in the peculiar umbilicus. The 

 localities are : 



Southivestern Missouri: Springfield, Greene Co., and Pearson's 

 Creek (A. G. Wetherby). 



Eastern Kansas: Fort Scott, Bourbon Co. (F. A. Sampson). 



Northivestern Arkansas: Eureka Springs (Sampson). 



It will be seen that although the range of P. neglecta comprises 

 localities in three States, they are not far removed from one another, 

 and so far, the total area indicated for the species is remarkably 

 small. 



The only reference to this form in previous conchological litera- 

 ture is under the name 



Triodopsis fallax, small variety, F. A. Sampson. Ann. Rep. 

 Geol. Survey of Arkansas for 1891, ii, p. 189 (1893). 



NOTES ON TWO VARIETIES OF PYRAMIDTJLA (PATULA) 

 ALTERNATA (SAY). 



BY GEORGE H. CLAPP. 



In the American Journal of Conchology, Vol. 6, page 188, the 

 late Dr. Jas. Lewis published a paper entitled " Notes on the Land 

 Shells of East Tennessee," in which he gave a very brief descrip- 

 tion of Helix (dternata Say var. costata. 



As this variety is found in various collections under the names of 

 Var. mordax and Var. costifera, it is thought that a description of 

 it will prove of interest. 



Pyramidida (Pati/fa") ahernata var. costata (Lewis). Shell flat- 

 tened on upper surface, more convex below, carinated, heavily 

 ribbed above, ribs ending on the cari'na, almost smooth below but 

 ribs faintly continued into the umbilicus with light intermediate ribs 



