382 



LAXD AND FRESH-AVATER SHELLS OF N. A. [pART IV. 



Habitat. — Warrior Kiver, Alabama. , . 



Diameter, -28 ; length, -50 of an inch. 



Observatio7is. — The above description is made from a single speci- 

 men, which is truncate at the apex ; as the species of this genus 

 Fip. 718. usually are. Three Avhorls are visible. In a perfect state, 

 it probably has four. The specimen before me has two 

 rows of tubercles. On the superior part of the whorl, and 

 below these, are two parallel, indistinct lines, which may, 

 in other individuals, rise into tubercles. In the interior, 

 two purple bands are visible. On the middle of the columella there 

 is a large, purple spot. This may not occur in all specimens. The 

 aperture is about two-thirds the length of the shell. — Lea. 



Anculotus smaragdinus. — Shell ovatcly turbinate, sometimes rather 

 solid, bright green ; spire tumidly exserted ; whorls slopingly con- 

 vex, smooth, encircled round the upper part 

 with three ridges; ridges oblong-granuled ; 

 aperture ovate; columella broadly callous. 

 Habitat. — Alabama. 



Observations. — This species has been con- 

 founded by Mr. Haldeman with the preceding. 

 It is of a peculiar bright green color, not 

 plicated from the sutures, but encircled with three spiral ridges, 

 swollen with transversely oblong grains, and there is no purple stain 

 upon the columella. — Heeve. 



As this species is very variable in outline and ornamentation, 

 four other figures are here given, all of which are from speci- 

 mens from the Coosa River, Alabama. Messrs. Haldeman 

 and Reeve, both make tuberculata a synonyme of plicata; 

 M. Brot does the same, and adds smaragdinus, Reeve ; bella, 

 Lea, is written a synonyme by Prof. Haldeman. 



Fig. 719. 



Fig. 720. 



2. Silicate species. 



2. A. Showalterii, Lka. 



.inculosa Showalterii, Lea, Proc. Acad. Xat. Sci., p. 93, 18G0. Jour. Acad, Nat. 



Sci., 2a eer., v, pt. 3, p. 2r)o, t. .^5, f. 02, March, 18o3. Obs., ix, p. 77, t. 3;"), f. 62. 

 Leptoxis Shotanlferii, liea, Hinnkv, Check List, No. 3S5. BuoT, List, p. 25. 

 Auculnttis sulcosus, Anthonv, MSS., Reevk, Monog. Anculotus, t. 6, f. 44, April, 



18'iL 

 Leptoxis sulcosd, Anthony, Bkot, List, p. 26. 



