124 THE NAUTILUS. 



received the book, but extracts from it will be found in this depart- 

 ment ot THE NAUTILUS from month to month. Our Chapter can- 

 not afford to do without THE NAUTILUS. 



On page 112, February number, under " Section C " the name of 

 the city (Toronto) was omitted in Mr. Lemon's address. 



Members of our Chapter interested in West Coast mollusks, will 

 find Dr. Wm. H. Dall's bulletin on " Diagnosis of New Species of 

 Mollusks from the West Coast of America " valuable. It contains 

 27 new species and 2 new genera. The shells were collected by the 

 Albatross from points as far north as Tillamook, Washington, to the 

 Gulf of Panama, excepting one species dredged off the Argentine 

 coast. In this species Philobryn, instead of the more familiar Urun- 

 phi/a is used for the genus, the reason for this is given. A Nucul/t 

 is described as being " one of the largest known." Two orbicular 

 species of Feriploma are described. Mention of this bulletin will be 

 found in the August number of THE NAUTILUS. 



Another publication of the National Museum is Charles T. Simp- 

 son's comprehensive work upon the Naiades, entitled "The Classifi- 

 cation and Geographical Distribution of the Pearly Freshwater 

 Mussels." The title will convey to our members some idea of its 

 scope. The genus Margaritana is placed with the genus Unio. A 

 comparison of Unio pressus and Margaritana rugosa is presented. 

 The various areas of the Naiades are given, Europe, Asia, Africa, 

 America and the islands of the seas, also a map showing distribution. 

 The Geological age of Unios is noticed, and the bulletin contains 

 many references to the hooks and pamphlets written on the pearly 

 freshwater mussels. It is a valuable contribution to molluscan lit- 

 erature. 



A TRAY OF SHELLS FROM DENMARK. 



(Extract from the report of the President, Prof. Josiah Keep. From the Transac- 

 tions of the Isaac Lea Chapter for 1896. 



(In the report of the President, Professor Keep, he has given 

 minute instructions in reference to an exchange of United States 

 shells for European forms by an illustration. He tells the members 

 of our Chapter how he sent some West Coast Mollusks to a gentle- 

 man in Copenhagen, the return of his box filled with foreign shells 



