GONIOBASIS. 221 



readily distinguish it from 3/. striatula, Lea, to which it might seem 

 allied by form and color; it has somewhat the form of M. vicina 

 (nobis), but that shell is more slender, less distinctly carinated, and 

 has not the striation of the present species. — Anthony. 



A very distinct and not uncommon species, remarkably 

 uniform in form and ornamentation. One of Mr. Anthony's 

 t^'pes is figured. In younger specimens the striae are more 

 strongly developed. 



109. Gr. angulata, Anthony. 



Melania angulata, Anthony, Ann. N. Y. Lye. Nat. Hist., vi, p. 117, t. 3, f. 17, March, 

 18.54. BisNEY, Check List, No.U. Bkot, List, p. 37. Keeve, Monog. Mela- 

 nin, sp. 38G. 



Melania cinnamomea, Anthony, Ree\'E, Monog. Melania, sp. 379. Brot, List, p. 35. 



Ooniobasis intercedens. Lea, Proc. Acad. Nat. Sci., p. 2G5, 18G2. Journ. Acad. 

 Nat. Sci., V, pt 3, p. 305, t. 37, f. 143. Obs., ix, p. 127. 



Description. — Shell acutely conic, smooth, brown, rather thick; 

 spire not remarkably elevated, but tapering regularly with a 

 rectilinear outline to the apex, which is entire and acute ; 

 whorls eight, nearly flat, upper ones carinate, and with a well 

 defined suture; body-whorl with a distinct angle, more dis- 

 tinct where it revolves near the top of the aperture ; below 

 this the base is rather concave on the columella side ; aperture mod- 

 erate, narrow, ovate, whitish or faintly tinged with red within ; col- 

 umella slightly curved, not indented ; sinus slight, but well defined. 



Habitat. — Tennessee. 



Diameter, -25 (6 millim.) ; length, -56 of an inch (14 millim.). 

 Length of aperture, -25 (6 millim.); breadth of aperture, -13 of an 

 inch (3 millim.). 



Observations.— A singularly neat, precise looking shell. Its trim 

 appearance, its pale color, unornamented by any band, and its sharp, 

 well defined angle, amounting almost to a carina, will serve to dis- 

 tinguish it from all others.— Anthony. 



The above description is that of the juvenile shell. In the 

 adult state it has been described by both Mr. Anthony and 

 Mr. Lea as follows : 



Melania cinnamomea. — Shell ovately conoid, cinnamon-brown, with 

 a narrow, chestnut zone at the sutures; whorls G-7, slopingly ven- 



