THE NAUTILUS. V 



Pachychilus vulneratus . . . . . . .139 



Paludestrina monas Pilsbry, n. sp 21 



Petricola denticulata, note on . . . . . .121 



Philomycus lactiformis (Blainvillc) 24 



Physa cubensis in Florida . . . . . . .70 



Pisidia new to our country and new species ... 9 

 Pisidium amnicum Mull. ....... 9 



Pisidium boreale Sterki n. n. (for septentnonale Prime pre- 

 occupied) ....... .12 



Pisidium contortum Prime 10,59 



Pisidium handwerki Sterki, n. sp 90 



Pisidium henslowianum Shep. ...... 9 



Pisidium medianum Sterki, n. sp. . . . . .10 



Pisidium medianum var. minutum Sterki n. var. . . .11 



Pisidium milium Held 10, 59 



Planorbis corpulentus Say ....... 133 



Planorbis crista var. cristata Drap. in Maine . . 59, 105 

 Planorbis opercularis var. multilineatus Yanatta . . 48 

 Planorbis rubellus Sterki and P. Harni Pilsbry . . .51 

 Polyg} r ra, new southwestern form of . . . . .37 



Polygyra appressa, notes on ...... 54 



Polygyra auriculata in Western Florida . . . .118 



Polygyra binneyana Pilsbry, n. sp 38, 60 



Polygyra caloosaensis Johnson, n. sp. Pliocene (illustrated) 07 

 Polygyra divesta indianorum Pilsbry, n. var. . . . 39 



Polygyra dorfeuilliana var. percostata Pilsbry, n. var. . 37 

 Polygyra monodon var. friersoni Pilsbry, n. var. . . 36 

 Polygyra neglecta Pilsbry, n. sp. ..... 40 



Polygyra tridontoides [= texasiana ED.] in New Mexico . 84 

 Polygyra uvulifera var. bicornuta, n. var. .... 107 



Pomatia aspersa in California ...... 60 



Pyramidula alternata, notes on two varieties of . . . 41 

 Pyramidula alternata var. costata Lewis . . . .41 



Pyramidula alternata var. rarinotata Pils., n. var. . .114 

 Publications received . .... 71,84,119,131 



Purpura coronata Lam. in America ..... 130 



Rhode Island, Collection of Fresh-water shells from . .112 

 Rumina decollata, some notes on . . . . .117 



Shells collected at Oakdale, Morgan Co., Tenn. . . .70 



