PLATE 119. 



Fig. 1, 2, 4, 5 & 6. Platyceras magnificum. 476 



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. 

 i a, b. A larger specimen, with the volutions free and the peristome less expanded. 



6 a, b. A larger specimen, having the ape.-c broken off. This specimen presents a sinuosity in 

 the posterior side of the aperture. 



6 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 tlian tw^o inches and a half in length. 



Fig. 3. Plattceras patulcm. 477 



View of the aperture where the p3ristome is spread over the body volution, and thickened 

 below. 



