308 LAND AND FRESII-WATER SHELLS OF N. A. [PART IV. 



excisa, but specimens recently received from Dr. Sliowalter satisfy 

 me that it is distinct. It is among tlie largest of the genus, being 

 nearly an inch long, and may be distinguished by its robust form and 

 its regular, elliptical outline. The specimens before me have three 

 broad, dark purple bands within, which give an indistinct dark green 

 hue to the outside, and stop short of the edge. The lip-cut stands 

 Avell out, and the hem-like margin is distinct and yellowish. The 

 base of the columella is yellowish. The aperture is half the length 

 of the shell. The hem is yellow, broad and well marked. — Lea. 



Mr. Reeve's fig. 20 intended to represent this species, I refer 

 to S. pumilum^i Lea. S. Alahamense is allied to Babylonicum, 

 Lea, but is, as it appears to me, well distinguished by the reg- 

 ularity of the striae, which cover the whole surface. 



19. S. Anthonyi, Reeve. 



Melatoma Anthonyi, Reeve, Monog., sp. 12, April, 186L 

 Gyrotoma Anthonyi, Reeve, Brot, List, p. 27. 



Description. — Shell conically ovate, rather solid, fulvous-brown ; 



spire produced ; whorls sloping round the upper part, concavely im- 



^. ^. pressed round the middle, last whorl en- 



Fig.693. Fig. 694. *^ 



circled by a single, dark ridge ; aperture 

 rather narrow, attenuately effused at the 

 base ; columella arcuately twisted. 

 Habitat. — Alabama. 



Observations. — This shell, received from 



Mr. Anthony without a name, appears to 



me to be distinct, and I am glad to avail 



myself of the opportunity of dedicating it to a gentleman to whom 



we are so largely indebted beyond all others for his researches after 



the Melaniadx of the southern United States of America. — lieeve. 



Mr. Reeve does not mention the character of the fissure, but 

 I judge from the figure that it is short and wide. The accom- 

 panying woodcuts are copied from Mr. Reeve's. 



