PLATE 119. 
Page 
Fig. 1, 2, 4, 5 & 6. Platyceras magnieicum. 47(5 
1 a. b. View of the spire and aperture of a young shell. The volutions are actually free to 
the apex, though not distinctly represented in the figure. 
2 a, b. A larger specimen with free volutions, having the aperture abruptly expanded. 
4 a, b. A larger specimen, with the volutions free and the peristome less expanded. 
5 a, b. A larger specimen, having the apex broken off. This specimen presents a sinuosity in 
the posterior side of the aperture. 
G a, b. View of the aperture and spire of a large specimen in which all the parts are sym¬ 
metrical and well preserved, and the volutions are free except at the extreme apex. This 
figure is represented as of the natural size; the extreme length being three inches and 
three-fourths, while the aperture is two inches and three-eighths in height, and a little 
more than two inches and a half in length. 
Fig. 3. Platyceras pattjlum. 477 
View of the aperture where the peristome is spread over the body volution, and thickened 
below. 
