THE NAUTILUS. 



Medionidus simpsonianus Walker, n. sp. 

 Melania habajimana P. & H., n. sp, 

 Melania libertina vai*. gigas P. & H., n. v. 

 Molluscan stampede (illustrated) 

 Museum Boltenianum .... 



]M3'rtle Beach, a new locality in S. Carolina tor 

 fossil mollusks .... 



Natica prietoi Hidalgo, at Algiers 



New collector in the field [a chipmunk] 



Notes and news .... 12, 22, 36,59 



Nudibranchs, Californian . 



Omphalina pilsbr}^ Clapp, n. sp. 



Oreohelix clappi Ferriss, n. sp. . 



Oreohelix strigosa metcalfei Cockerell, n. subsp. 



Cstrea arrosis Aldrich, n. sp. (PI. Ill) Eocene of Alabama. 



Oyster, a distorted ........ 



Panacea Dall, n. gen. ........ 



Panopea bitruncata Conrad (Plate lY) . . . . 



Parmulophora Dall, n.n. for Parmulina Dall, preoc. . 



Parrej^sia barnumi Pils., n. n. for Unio brown! Whitf. preoc. 



Patinigera Dall, n.n. for Patinella Dall, 1870 (not Gray, 

 1848) 



Pennsylvanian snails and the State Zoologist 



Petriola Dall, n.n, .... 



Phacoides (Miltha) xantusi Dall, n, sp. 



Pholeoteras euthrix , , . . 



Physa gyrina ..... 



Pisidium atlanticum Sterki, n. sp. 



Pisidium limatulum Sterki, n. sp. 



Plectop3'lis in the Riukiu Islands 



Plectopylis (Sinicola) hirasei Pils., n. sp 



Pleurotoma (Antiplanes) catalinae Raymond, n 



Pleurotoma (Genota) stearnsiana Raymond, n. sp. 



Pleurotoma from the pliocene of California, a new 



Polygyra appressa tryoniana Pils., n, subsp. 



Polygyra w^heatleyi clingmanica Pils,, n, subsp. . 



Polyg3^ra monodon and P. hirsuta, Albino . 



Polygyra (Stenotrema) barbata Clapp, n. sp. 



Polygyra stenotrema seminuda Clapp, n. var. 



. 136 

 8 

 , 9 

 . 31 

 .84 

 rc'cenl and 



. 60 



. 21 



. 23 



, 67, 84, 91. 131 



131 



30 



53 



113 



61 



24 



143 



73 



113 



12 



113 



131 



143 



111 



67 



31 



128 



108 



58 



58 



2 



1, 15 



14 



89 



90 



92 



85 



. 86 



sp. 



