134 PHYSA. 
9. PHYSA DIAPHANA, Tryon. 
Plate 6, fig. 15. 
Shell smooth, oval, lengthened; spire of 
moderate length, suture impressed; body 
whorl four-fifths of the entire length, some- 
what cylindrical, very fragile, growth lines 
crowded, but minute; columellar lip very 
short, commencing low down, very much ap- 
pressed and much twisted to the right towards 
the base, polished and very pearly. 
Length 13, diam. 7 mill. 
California. 
Resembles Ph. sparsestriata, nob., in form, 
but is at once distinguished from that species 
by being smoother, with the growth lines 
more crowded, and from that and all other 
Phys by the very peculiar columella, which 
curves diagonally to the right at such an angle 
as to make it appear almost truncate. 
(50) 
