118 AMERICAN JOURXAIi 



'* Descriptions of new species of Marine Bivalve Mollusca in 

 the collection of the Academy of Natural Sciences of Philadel- 

 phia ;" by Geo. W. Tryon, Jr. 



"Notices and Reviews of New Conchological Works;" by 

 Geo. W. Tryon, Jr. 



The following was offered for separate publication : 



" Monograph of the Fresh-water Univalve Mollusca of the 



United States ; Parts 1 and 2 (in continuation of Prof. Halde- 



man's work) ;" by Geo. W. Tryon, Jr. 



Mr. Tryon read the following letter addressed to him for the 

 purpose of publication in the Journal : 



Dear Sir : 



On the 6th of June last I found a number of living specimens 

 of what I believed to be the Helicina occulta of Say. Doubting 

 my own judgment, I submitted some of them to Messrs. W. G. 

 Binney and T. Bland. Those gentlemen have confirmed my 

 opinion, and say : " We are both confident about its identity, — 

 thus settling satisfactorily a long mooted point." 



The precise locality where they occur is a fishing station, 

 known as Whitefish Bay, about five miles north of this city, upon 

 the bluff of the lake, which, at that point, is somewhat wet and 

 boggy, and covered with a growth of Tamarack, Arbor- Vitse, and 

 Juniper. They were found under dead leaves in considerable 

 quantities, yet could hardly be s'aid to be abundant. 



Very respectfully, 



E. R. Leland. 



Milwaukee, Wis., Juiy 19, 1869. 



Mr. Tryon remarked that until recently this species was be- 

 lieved to be extinct; but a year or more since, recent specimens 

 were forwarded to the Section from Lexington, Virginia, where 

 they were collected by Prof. McDonald, of the Virginia Military 

 Institute. Prof. McD. reported the shell to be abundant in this 

 locality. 



Mr. John Ford exhibited specimens of a Greynma gemma, Tot- 

 ten, remarkable for having fallen during a storm which occurred 

 at Chester, Pa., on the afternoon of June 6th, 1869. 



These specimens were apparently adult, though very minute ; 

 measuring one-eighth of an inch in length, by three-sixteenths of 

 an inch in breadth. 



Mr. F. stated that he had made inquiry of several gentlemen 

 who had witnessed the storm on the occasion referred to, and 

 that the answers of each of them had so corroborated those of 

 the others as to leave no doubt in his mind as to their having 

 fallen in immense numbers. 



