VI THE NAUTILUS. 



Polygyra multilineata chadwicki Ferriss, n. var. . . 37 

 Polygyra polita Pilsbry & Hinkley n. sp. (PI. V, tig. 11) . 38 

 Polygyra soelneri Henderson, n. sp. (PI. Ill, tigs. 1,2) ' 13 

 Pomatiopsis robusta Walker, n. sp. . . . . 97 



Publications received . . . .23, 36, 48, 72, 119, 132 



Pyrgulopsis wabashensis Hinkley n. sp. . . . .117 



Rissoa grippiana Dall, n. sp. . . . . . 136 



Rhode Island, Additions to the shell-bearing mollusca . 47 

 Rous, Sloman (obituary) ...... 72, 84 



Say's early writings and species, A few notes on 31 



Scala dolosa Aldrich, n. sp. (PI. I, tig. 13) . . . .11 



Scala vetusta Aldrich, n. sp. (PL I, tig. 9) . . . .10 



Spineoterebra Sacco . . . . . . .125 



Spiraxis tarnpicoensis Pils. (PL III, fig. 5) . . . 28, 77 

 Stearns, Frederick (obituary) ...... 83 



Succinea ovalis Say ........ 32 



Terebratulina brundidgensis Aldrich, n. sp.(Pl. I, figs. 1,2,3) 8 

 Terebridae, Subdivisions of the ...... 124 



Tresus nuttalli Conr. . . . . . . . .141 



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

 Triton gibbosus Brod. in California ..... 106 



Tritogonia tuberculata with ova 48 



Trivia pilula Kiener, Note on . . . . .59 



Turbonilla anita Aldrich, n. sp. (PL I, fig. 2) . .9 



Turbonilla castanea Dall & Bartsch, preocc.=T. castanella 



Dall, n. n., 131 



Turbonilla harrisi Aldrich, n. sp. (PL I, fig. 8) . . . 9 

 Unio angasii Lea . . . . . . . .118 



Unio bednalli Tate . . . . . . . .118 



Unio crassus Say ........ 32 



Unio gigas (Swains.) Sby. (U. cumiugii Lea.) . . .49 

 Unio ochraceus ......... 33 



Unio plicatus Say ........ 33 



Unio plicatulus Lea. ........ 50 



Unio popei Lea. . . . . . . . . .79 



Unios, The gravid periods of . . . . .87 



Unionidae, Notes on Australian . . . . . .118 



Unionidse, Notes on exotic (PL VI) . . . . .49 



Vendryes, Henry (obituary) ...... 107 



