Vlll THE NAUTILUS. 



Pleurodonte acuta var. julia . . . . . .140 



Pleurodonte acuta var. lucerna Mull. . . . . .140 



Pleurodonte acuta var. sublucerna Pils. .... 140 



Pleurodonte adarnsiana Clapp, n. sp. .... 33, 37 



Pleurodonte bainbridgei Pfr. ..... 138, 141 



Pleurodonte carmelita Fer. . . . . . 137, 138 



Pleurodonte chemnitziana Pfr. ..... 137, 138 



Pleurodonte (Labyrinthus) Clappi Pils., n. sp. . . 34, 37 

 Pleurodonte gigantea . . . . . . 14, 36 



Pleurodonte ingens var. imperforata Adams . . . 138 

 Pleurodonte ingens var. indigna Adams .... 138 



Pleurodonte ingens Adams ..... 137, 138 



Pleurodonte oxytenes Adams ..... 137, 140 



Pleurodonte patina Adams ..... 137, 138 



Pleurodonte patina var. nobilis Adams .... 138 



Pleurodonte pretiosa Adams ..... 138, 141 



Pleurodonte soror Fer. var. peracuta Yendryes, n. var. . 102 

 Pleurodonte spengleriana Pfr. ..... 138, 141 



Pleurodonte subacuta Pfr. . . . . . . 137, 138 



Pleurodonte vacillans Yendryes, n. sp. . . . .101 



Pleurotomaria, note on the name . . . . .127 



Pleurotomarius = - Pleurotoma . . . . . .127 



Polygyra devia var. bemphilli "W. G. B. . . . .129 



Polygyra thyroides sanctisimonis Pils., n. var. ... 8 



Polygyra townsendiana var. ptychophora A. D. Brown . 129 

 Polymesoda, the generic name for the American C} r renas . 48 

 Potamides (Cerethidea) californica, how it travels . . 82 

 Pristophora Serridens ....... 144 



Pyramidula alternata, the sub-species of . . . .6 



Pyramidula alternata var. kuoxensis Pils., n. var. . . 6 

 Pyramidula elrodi Pils. . . . . . . .130 



Publications received . . . 9, 24, 36, 84, 107 



Quadrula andrewsii Marsh, n. sp. ..... 115 



Quadrula lananensis Frierson, n. sp. . . . . . 75 



Rhode Island, the shell-bearing mollusca of 92, 104, 113, 130 



Septidse, a new term for Tritonidee 108 



Serridens oblongus Cpr 144 



Simpson, George B 107 



Sphaerium partumeium Say 103 



