664 PROCEEDINGS OF THE ACADEMY OF [Dec, 



BERMUDA SHELLS. 

 BY E. G. VANATTA. 



The following lists are based upon land shells collected by Mr. 

 Stewardson Brown during 1905, 1908, 1909; and land and fresh-water 

 shells collected by E. E. Vanatta and the author during 1910. All 

 the species listed are recent specimens now in the collection of the 

 Academy of Natural Sciences of Philadelphia. 



It is interesting to have found living examples of some of Mr. A. 

 Gulick's fossil species, showing that they are not very old, especially 

 since one proved to belong to the Old World genus Kaliella. 



Separate lists of the various localities are given, as the distribution 

 of some of the species seems to be local and not general. It is to be 

 hoped that future collectors will not mix the specimens from the 

 different islands. 



Messrs. Boyer and Keeley examined the diatoms which we gathered 

 at Pembroke Marsh and pronounced them all fresh-water forms. 



Polygyra plana (Dunker). 



Helix microdonta Desh. in Fer. Hist., I, 1839, p. 6, pi. 72, fig. 13. Not 



Helix microdonta Desh., Enc. Meth., II, 1832, p. 266 (= Stylodonta uniden- 



tata Dillw., 1817). 

 Helix plana Dkr., Philippi, Abb. Bes. Conch., I, Oct., 1843, p. 51, Helix, 



pi. 3, fig. 11. 

 Helix delitescens (Shutt.) Bland, Ann. Lyceum N. H. N. Y., VII, April, 1860, 



p. 134, 140, 360. 

 Helix cheilodon (Say MSS.) Bland, Ann. Lyceum N. H. N. Y., April, 1S60, 



p. 141. 

 Helix ringens Lane, Five Essays: The History of the Spiral Snail, Bermuda, 



p. 2, pi. 1, fig. 3. (Mr. F. T. Frith, the librarian at the Bermuda Public 



Library, informed me that this book was published about 1892.) 

 Polygyra microdonta Desh., Pilsbry, Trans. Conn. Acad., X, 1900, p. 493, 



pi. 62, fig. 3. 



Bermuda specimens were submitted by Dr. Pilsbry to Prof. Dr. 

 Joh. Thiele, of Berlin, for comparison with the type of Helix plana 

 Dunker contained in the Konigl. Zoologisches Museum, who kindly 

 replied as follows: "Ein Yergleich ihrer Polygyra plana von Ber- 

 mudas mit dem typischen Exemplar der Dunkerschen Sammlung 

 ergiebt die vollstandige Uebereinstimmung ; die Oberflache zeigt 

 dieselbe feine Streifung." 

 Eulota similaris (F<§r.). 



In Five Essays: The History of the Spiral Snail, Rev. W. G. Lane 



