$1.00 per Year. ($1.12 to Foreign Countries ) lOcts. a copy. 



THE 



NAUTILUS.!* 



<^/iy 



/* *- 



A MONTHLY 



DEVOTED TO THE INTERESTS 

 OF CONCHOLOGISTS. 



EDITOR : 

 H. A . PILSBRY, Conservator Conchological Section, Academy of Natural Sciences, Philadelphia 



ASSOCIATE EDITOR : 

 C. W. JOHNSON, Curator of the Wagner Free Institute of Science. 



Vol. X. 



MAY, 1896. 



No. 1 



CONTENTS : 



PAGE. 



NEW SPECIES OF LEDA FROM THE PACIFIC COAST. By Wm. H. Dall. . 1 



SOME REFERENCES TO THE GENUS OLIVA. By John Ford. .... 3 



DESCENT AND DISTRIBUTION OF UNIONID.. By Berlin H. Wright. . . 5 



A FEW NOTES ON PISIDIA. By Dr. v. Sterki 8 



ISAAC LEA DEPARTMENT 10 



NOTES ON SOME ONTARIO SHELLS. By James H. Lemon 10 



CUTTLE FISHES WASHED ASHORE IN SAN PEDRO BAY. By H. Lowe. . 11 



GENERAL NOTES ] 2 



NEW PUBLICATIONS RECEIVED 12 



Published by 



H. A. PILSBRY, Editor, Academy of Nat. Sciences, Philadelphia. 



C. W. JOHNSON, Manager, Wagner Free Institute of Science, Philad'a. 



Entered at Philadelphia Post-Office as second-class matter. 



