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



THE 



NAUTILUS 



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. VII. I 2j,J^I^ APRIL, 1894. No. 12. 



CONTENTS : 



PAGE. 



The Californian Species of the Genus Nuttallina. 



By W. J. Raymond. 133 

 Land and Fresh-Water Shells of Allegheny County, Pa. . . 135 



A New Papuina. By Charles Hedley 136 



On the Species of Mactra from California. By Wm. H. Dall. . . 136 

 Notices of New Chitons, III. By H. A. Pilsbry. .... 138 



Descriptive Notes on Certain Forms of Polygyra. By H. A. Pilsbry. 139 



Remarks on Astyris Gouldiana. By A. H. Gardner 141 



Note on Patella Kermadecensis, Pilsbry. By'Geo. W. Taylor. . . 142 

 Notices of New Japanese Mollusks, I. By H. A. Pilsbry. • . . 143- 

 Notes and News. 144 



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-OflBce as second-class matter. 



