THE HAUTILUS. V 



Ilyanassa obsoleta iu San Francisco Bay . . . .91 



Lampsilis fimbriata Frierson, n. sp. . . . . . 86 



Littorina nebulosa Lam. var. columellaris Orb. . . .71 



Lymnaea jacksonensis Baker, n. sp. . . . . 52 



Lymneea pseudopinguis Baker, n. sp. . . . . .54 



Maine, Shells of the Lake region of . . . . 106 



Mollusks of North Haven ..... 142 



Pulmonates of the Manticus Is. . . . .5 



Marginella apiciua Menke, Sinistral . . . . .91 



Mathilda elongatoides Aldrich, n. sp. (PI. I, fig. 6) .10 



Mathilda leona Aldrich, n. sp. (PL I, figs. 4, 5) . . .10 

 Mathilda singularis Aldrich, n. sp. (PI. I, fig. 11) . .10 

 Matinicus Islands, Maine pulmonates of the ... 5 

 Mexican shells, Description of New . . . 25, 36, 38, 86 

 Mexico, Shell-collecting in Northeastern . . . 68, 76 

 Micrarionta desertorum Pils. and Ferr., n. sp. (PI. IX, figs. 



6-10 134 



Milax gagates in Colorado ....... 131 



Murex carpenter! var. alba Berry, n. var. . . . .105 



Neoplanorbis carinatus Walker, n. sp. (PI. IX, figs 17, 18) . 127 

 Neoplanorbis smithii Walker, n. sp. (PL IX, figs. 1,2) . 126 

 Neoplanorbis tantillus Pils. . . . . . 126, 129 



Neoplanorbis umbilicatus Walker, n. sp. (PL IX, figs. 3, 4). 126 

 New York, A collecting trip at Northport . . . .98 



North Carolina, A new Polygyra from . . . .13 



Oysters are wild animals ....... 47 



Pachycheilus vallesensis Hinkley, n. sp. (PL V, figs. 1-10) . 25 

 Paludestrina tampicoensis Pilsbry & Hinkley n. sp. (PL 



Y, fig. 13) 39 



Paphia staminea Conr. . . . . . . .141 



Pelseneer's treatise on Mollusca ...... 80 



Pennsylvania, Notes on the conchology of Pocono Manor ' 67 

 Perirhoe Dall, nov. section of Terebra . . . 124, 125 

 Planorbis magnificus Pils. ....... 90 



Planorbis multivolvis Case (PL YIII) 62 



Polygyra aulacomphala Pils. & Hinkley n. sp. (PL Y, 



fig. 12) . . 38 



Polygyra hopetouensis Shuttlw. ...... 7 



Polygyra martensiana Pils. n. sp. (PL XI, figs. 1-3) . 26, 133 



