36 THE NAUTILUS. 



a rim or collar at one end, in the penis, similar to that which he had 

 previously described and figured in Helix (Cochticella) acuta. 

 Further investigations are in progress. 



GENERAL NOTES. 



NOTE ON MOLLUSKS FROM ARCADIA, MISSOURI. Mr. Frank 

 M. Woodruff, while on a collecting trip during the latter part of 

 May and first part of June, incidentally picked up a few mollusks, a 

 list of which may be of some value and interest in the study of geo- 

 graphic distribution. The region is reported by Mr. Woodruff to be 

 rather stony and arid, the rock being granitic, and pulmonate mol- 

 lusks, therefore, were very scarce. The Mississippi River was very 

 high, in fact a veritable torrent, and but one fresh-water mollusk 

 was found. The list of species is as follows : 



Latnpsilis ventricosus Barnes. Arcadia. 



Polyc/yra exoleta Binuey. Vineland. 



Polygyra thyroides Say. Viueland. 



Polygyra clausa Say. Arcadia. 



Polygyra appressa Say. Arcadia. 



Polygyra dorfeuilliana Lea. Arcadia. 



Vitrea indentata Say. Arcadia. 



Py f<i in iii iila alternata Say. Arcadia. 



All of the specimens were typical. One specimen of appressa had 

 a rather flat spire, but was otherwise normal. FRANK C. BAKER. 



FOSSIL PEARLS. Not having read anywhere that " fossil " pearls 

 have been found or noticed in the literature, I submit the following 

 facts : 



Some years ago, while looking over some sand (very carefully) 

 that I had collected on the Chipola River in west Florida, from 

 Oligocene strata, I found and saved a pretty little pearl. I after- 

 wards found one in some Pliocene sand from California collected by 

 Dr. R. E. C. Stearns. I also found one other in some sand from 

 Claiborne, Ala., which I had collected from the Eocene. Lately, 

 while looking over some fossils from the " Woods Bluff" Eocene 

 from Thomasville and Choctaw Corner, Clarke Co., Ala., I found 

 one other pretty little fellow, so that we now have four of them here 

 for investigation. 



Such fossil specimens may be in other museums, but I have not 

 seen or heard of the fact after diligent enquiry among the wisest of 

 our workers here. FRANK BURNS, PH. D. 



