MUSEUM OF COMPARATIVE ZOOLOGY. 151 



margin of the foot and caiulal niurus-pore, over wliicli is a liump-like process : 

 no distinct locomotive dislc: external respiratory and anal orifices at the central 

 ri^ht margin of the mantle : orifice of comljined genital system near the right 

 eye-peduncle. 



Shell-plate horny, small, unguiform, longer than wide, with posterior nucleus 

 and concentric lines of growth, exposed in part. 



Jaw rihbed. 



Lingual membrane with tricuspid central teeth, bicuspid laterals, and quad- 

 rate marginals. 



Coast of Oregon. 



The swollen central portion of the animal seems the first approach to a tur- 

 binate mass of viscera, separated from the foot. 



This emended generic description is drawn from larger specimens (40 mm. 

 contracted in alcohol) collected at Portland, Oregon, by Mr. H. Hemphill. 

 Found also at Tacoma, Puget Sound, and Olympia, Washington Territory, l>y 

 the same collector. 



Polygyra auriculata, Sat. (p. 263.) 

 Cedar Keys : St. George's Island, Florida. 



Polygyra Texasiana, Moricand. (p. 270.) 

 Fort Gibson, Indian Territory. 



Polygyra Dorfeuilliana, Lea. (p. 278.) 



Fort Gibson, Cherokee Nation, Indian Territory : Ali'xandria, Louisana. 

 "Wc'therby suggests the specific name of Sampsoiii iov the variety described 

 in Yiil. V. 



Polygyra pustuloides, Bland, (p. 287.) 

 Lookout Mountain, Tennessee. 



Polygyra leporina, Gould, (p. 288.) 

 Fort Gibson, Indian Territory. 



Polygyra Harfordiana, J. G. Coorr.u. (p. 809.) 



Fig. 203 is said by Dr. CDiipcr not to represent liis species, l)ul ivithor the 

 Salmon lUver sm;ill furni of Mi'^^idnn (hri<t var. Mulldil. 1 have, llierefure, 

 here given a figure of ])r. Cooi)er's original type of 

 D. IlarfimUann preserved at tli(; Academy of Natural 

 Sciences at Philadeliiliia. The species from this seems 

 more nearly allied to pnhjijijra than to Triodiqma. 



