THE NAUTILUS, 



Mollusca of Cincinnati ....... 67 



Mollusks collected at Castle Island, Boston, a list of . . 129 

 Neosimnia catalinensis Berr}-, n. sp. (PI. 5, fig. 3) . .21 

 New Jersey shells ........ 72 



New Mexico, a new pleistocene mollusk locality in . . 134 

 New species from the cretaceous and tertiarv of California 68, 77 

 Notes .... 12, 24, 48, 56; 71, 83, 96,120, 132 



Nudibranchs, method of preserving . . . . .142 



Nudibranchs, the nature of conical bodies in the mantle . 103 

 Opeas mauritianum Pfr. in Philadelphia, Pa. . . .12 



Operculum evolution, notes on. . . . . .97 



Oregon, snails from near Mt. Hood . . . . .117 



Oreohelix pilsbryi Ferriss, n. sp. . . . . . 102 



Ostrea titan Conr. var. perrini Hall & Ambrose n. var. . 80 

 Ovula from California, a new . . . . . .21 



Oxychona bifasciata Burrow (PI. iv, figs. 4, 8). . . 127 

 Oxychona boscianablanchetianaMoricand (PI. iv, figs. 2, 3) 127 

 Oxychona, notes on the bifasciata group of . . .125 



Oxychona pyramidella currani Bartsch, n. subsp. . 53, 128 

 Panopea smithii Hall & Ambrose n. sp. . . . . 79 



Parametaria Dall, n. n. for Meta Rve. . . . .25 



Pecten clarkensis Hall & Ambrose, n. sp. . . .. 68 



Pecten tolmani Hall & Ambrose, n. sp. . . . . 82 



Pholadomya harrigani Hall & Ambrose, n. sp. . . 77 



Pleistocene mollusca from Callaway Co. , Mo. . . .64 



Philomycus (Pallifera) arizonensis Pils. , n. sp. . . 119 



Planorbis dilatatus and P. sampsoni . . . .95 



Pleurocera of Try on becomes Ceriphasia Swains . .114 



Pleurocera Raf., replaces Angitrema of Tryon's Monog. . 114 

 Pleurocera subulare Lea ....... 122 



Pleurodonte (Zachrysia) torrei Henderson, n. sp. (PI. I). 49 

 Polygyra albolabris Say ....... 140 



Polygyra albolabris major and fuscolabris. . . .24 



Polygyra brevipila cherokeensis Clapp, n. subsp. . . 3 

 Polygyra labrosa fimbriata Clapp ..... 139 



Polygyra zaleta ........ 140 



Popular names of shells ....... 87 



Publications received . . . . . 9, 48, 59, 96 



Rafinesque's genera of fresh- water snails .... 109 



San Diego drift shells ....... 83 



Scalenostoma babylonia Bartsch '. . . . .74 



Scalenostoma rangii de Folin ...... 73 



Schloenbachia templetoni Hall & Ambrose, n. sp. . . 78 

 Shell hunt in the Black Range ...... 99 



Shells of Mt. Monadnock, N. H 57, 84 



Sierra Nevadas, shell collecting in . . . . .92 



