THE'NAUTILUS. 63 



El*., 



plentiful. It seems strange that a species once so abundant here 

 should have entirely disappeared. 



Following is a list of the species I have taken from the marl beds 

 at New Harmony and Grand Chain : 



Helicina occulta Say. Abundant. 



Vallonia pulchella (Miill.). 



Polygyra multilineata (Say). 



Polyyyra hirsuta (Say). Abundant. 



Polygyra monodon (Rack.). Abundant. 



Polygyra monodon fraterna (Say). Abundant. 



Strobilops labyrinthicus (Say). 



Strobilops qffinis Pils. 



Pupoides marginatus (Say). Common. 



Bifidaria armifera Say. 



Bifidaria contracta Say. 



Circinaria concava (Say). 



Omphalina inornata (Say). 



Vitrea hammonis (Strom.). 



Vitrea wheatleyi (Bland). 



Euconulus fulvus (Miill.). 



Zonitoides nitidus (Miill.). 



Zonitoides arboreus (Say). 



Gastrodonta ligera (Say). 



Pyramidula alternata (Say). 



Pyramidula perspecliva (Say). 



Pyramidula striatetta (Anth.). 



Helicodiscus lineatus (Say). 



Succinea retusa Lea. 



Succinea avara Say. 



Pomatiopsis lapidaria Say. Abundant. 



NOTES ON MOELLENDORFFIA AND STEGODERA. 



BT HENRY A. PILSBRT. 



In southeastern China, Tonquin and the neighboring region, there 

 is a group of curious Helices with reflexed lip, toothed aperture or 

 plicate throat, and granose, often hairy surface. The systematic re- 



