128 THE NAUTILUS. 



POLYGYRA INFLECTA MOBILENSIS NEW VAE. 



BY GEO. H. CLAPP. 



A very interesting form of P. inflecta has recently been found 

 by Mr. L. H. McNeill in Mobile, Ala., and as it seems to be 

 constant, having been found in two different parts of the City 

 and on Dauphine Island, I have named it as above. 



It differs from the type in being flatter, with the last whorl 

 less swollen beneath, the teeth small and weak, and in always 

 having the umbilicus partly uncovered ; white to light-horn-color 

 but " when found the shells are covered with a black, very ad- 

 herent coating". 



On Dauphine Island, in the Gulf just at the entrance to 

 Mobile Bay, Mr. McNeill found dead shells of the same form. 



The majority of the shells have about one half whorl less than 

 the typical form, from Mobile, as shown by measurements 

 below. 



Six examples, the largest to smallest, measure : 



Gr. cliam, 11^, alt., 6 mm. whorls 5 



5| 41. 



" 5 " 



" 5 " 4i 



10 J, "5 4f 



10, " 5J " 4| 



Five typical shells from Mobile measure : 

 Gr. diam. lOf, alt. 6f mm. whorls 5 

 " lOf, " 6| " " 5 

 " IQi, 6^ " 5 



IQi "6 "5 



" 10^ " 6i " " 5 



Types number 7163 of my collection. 



THE EARLIEST NOTICE OF A SPECIES OF TBE GENUS GUNDLACHIA. 



BY WM. H. BALL. 



Rummaging through the volumes of the "Skrivter" of the 

 Natural History Society of Copenhagen in which Lorenz Spengler 



