Occasional Papers of the Museum of Zoology 1 3 



Lac anx Morts, pond two miles west of Garske. The record 

 of this species from North Dakota connects the first United 

 States record with the Canadian locahties. Walker notes its 

 occurrence in Deuel County, South Dakota, in 1910.'* Since 



Upper figures: Scgiiiciitiiia annigcra Say. 

 Central figures: Scgmentina christyi Dall. 

 Lower figures: Segmcntina crassilahris Walker. 

 Outlines to the right indicate palatal lamellae as they appear 

 through the shell. 



that time no further records for the species have been pub- 

 lished, so far as known. The snails were found alive in the 



''Walker, Bryant., A new Species for the United States Fauna. 

 Nautilus, XXIV, 1910, p. 11. 



