270 LAND AND FRESH-WATER SHELLS OE N. A. [PART IV. 



Observations. — The whole of five individuals before me have the 

 apex decollate. This species closely resembles the OcoeSnsis, herein 

 Fio- 511 described. It is, however, larger in the aperture, which is 

 more rotund, and the species seems to be larger. — Lea. 



The following are synonymes : — 



Melania plebeiiis. — Shell small, rather solid, plain, trun- 

 cated ovate-conical, reddish-brown; whorls three, flattened, 

 the last large, ventrlcose, subangulated; sutures well im- 

 pressed, aperture large, ovate ; lip dilated anteriorly. Fig. 515. Fig. 516, 

 scared}' siuuated posteriorly; columella white or 

 Fig._5i7. Fig. 518. Stained with red. M/r 



Habitat. — Saline Co., Arkansas. 

 Ohservations. — A small, appar- 

 ently variable species, without any attractive char- 

 acters. The angle around the last whorl is more or 

 less marked, or even Avanting. Small specimens appear to be much 

 like J/. Kickliniana. — Antliowj. 



The figures are from t^-pe specimens. 



Melania bnmnea, Anth., is characterized from thinner and 

 better grown specimens of this shell. 31. ixiula., Anth., (un- 

 published) is the young, not yet half grown. The species 

 resembles somewhat M. iostoma., Anth., and Mr. Lea believes 

 them to be identical, but as it appears to me iostoma is darker, 

 'and a little more angulate at the periphery. M. Nickliiiiana 

 is smaller, wider, with spire more truncate. The following is 

 the description of 



Melania brunnea. — Shell elongate-ovate, smooth, thin, brown; spire 

 obtusely elevated; whorls six, nearly flat; body-whorl convex, some- 

 times three-banded; sutures irregularly but decidedly im- 

 pressed; aperture large, broad, elliptical, within whitish, 

 or tinted with reddish ; columella somewhat indented below 

 the middle, and forming a very small sinus at base. 



Habitat. — Alabama. 



Diameter, -32 (8 millim.) ; length, -TG of an inch (20 mil- 

 lim.) Length of aperture, -37 (9 millim.) ; breadth of aperture, -23 

 of an inch (G millim.). 



Observations. — A smooth, fine species, with no very prominent 

 characters. May be compared with 31. perfusca. Lea, but is less 



