THE NAUTILUS. 



Pachychilus vulneratus 



Paludestrina monas Pilsbry, n. sp. 

 Petricola denticulata. note on 

 Philomycus lactiformis (Blainville) 

 Plrysa cubensis in Florida . 

 Pisidia new to our country and new species 

 Pisidinm amnicnm Mull. .... 



Pisidinm boreale Sterki n. n. (for septentriovale 

 occupied) ...... 



Pisidium contortum Prime . 



Pisidium handwerki Sterki, n. sp. 



Pisidium henslowianum Shep. 



Pisidium medio nu m Sterki, n. sp. 



Pisidinm medianum var. mi nut urn Sterki n. var. 



Pisidium milium Held .... 



Planorbis corpulentus Say .... 



Planorbis crista var. cristata Prop, in Maine 



Planorbis opercularis var. multilineotus Vanatta 



Planorbis rubellus Sterki and P. Harni Pilsbry 



Polygyra, new southwestern form of . 



Polygyra appressa, notes on 



Polygyra auriculata in Western Florida 



Polygyra binneyana Pilsbry, n. sp. 



Polygyra caloosaensis Johnson, n. sp. Pliocene ( 



Polygyra divesta indianorum Pilsbry, n. var. 



Polygyra dorfeuilliana var. percostata Pilsbry, n 



Polygyra monodon var. friersoni Pilsbry, n. var 



Polygyra neglecta Pilsbry, n. sp. 



Polygyra tridontoides [== texasiana — Ed.] in Ne 



Polygyra uvulifera var. bicornuta, n. var. . 



Pomatia aspersa in California 



Pyramidula alternata, notes on two varieties of 



Pyramidula alternata var. costata Lewis 



Pyramidula alternata var. rarinotata Pils., n. vai 



Publications received .... 



Purpura coronata Lam. in America . 



Rhode Island. Collection of Fresh-water stalls fi 



Rumina decollata, some notes on 



Shells collected at Oakdale, Morgan Co., Tenn. 



