ANCULOTUS.— Plate V. 



at the periphery, aperture ovate, marked within with 

 four purple bands, slightly sinuated above and below, 

 columella rather callous. 



Melania basalis, Lea, Trans. Amer. Phil. Soc. pi. 9. f. 33. 



Hab. Alabama, United States. 



The keel surrounding the periphery of this species is 



somewhat indistinct, and is probably often wanting. 



Species 41. (Fig. 41 a, Mus. V. d. Busch.) 



Anculotds costatus. Anc. testa, ylobosd, snbuiflatd, 

 fuho-olivaced, spird minidd, anfractibus convexis, un- 

 dique spiraliter cariuatis, ultimo multo majore, colu- 

 mella callosd, purpureo tinctd. 



The ribbed Anculotus. Shell globose, somewhat in- 

 flated, fulvous-olive, spire very small, whorls convex, 

 spirally keeled throughout, the last whorl much the 

 larger, columella callous, purple-stained. 



Anthony, Boston Journ. Nat. Hist. vol. iii. pi. 3. f. 1. 



Hab. Ohio, United States. 



A Lacu?ia-\ike shell, regularly spirally ribbed with fine 

 keels. 



Species 42. (Mus. Cuming.) 



Anculotus cakinatus. Anc. testa ovato-lurbinatd, oli- 

 vaceo-viridi, spird subexsertd, anfractibus declivi-con- 

 vexis, deinde angulato-carinatis, undique minute decus- 

 satim striatis, aperturd pyriformi-ovatd, columella con- 

 cavo-appressd, quasi umbilicatd. 



The keeled Anculotus. Shell ovately turbinated, 

 olive-green, spire rather exserted, whorls slopingly 

 convex, then angularly keeled, minutely decussately 

 striated throughout, aperture pyriformly ovate, colu- 

 mella concavely appressed, as though umbilicated. 



Anthony, Boston Journ. Nat. Hist. vol. iii. p. 394. pi. 3. 

 f. 5. 



Hab. Falls of the Kanawha, United States. 



The spire of this species is more solidly exserted than 

 in the preceding. 



Species 43. (Fig. 41 b, Mus. V. d. Busch.) 



Anculotus trilineatus. Anc. testa turbinatd, lenui, 

 viriduld, lineis purpureis tribus cingulatd, spird pared, 

 acuta, anfractibus convexis, ultimo multo majore, infla- 

 lo, aperturd ampld, patuld, columella calloso-appressd, 

 purpureo tinctd. 



The three-lined Anculotus. Shell turbinated, thin, 

 greenish, encircled with three purple lines, spire 

 small, sharp, whorls convex, the last much the larger, 

 inflated, aperture large, open, columella callously 

 appressed, purple-stained, 



Melania Irilineata, Say, New Harm. Diss. vol. ii. p. 277. 



Hab. Falls of Ohio, United States. 



It will be seen by the numbering of the figure, 41 b, 

 that I had regarded Mr. Anthony's A. costatus to be a 

 variety of this species, but the form, colouring, and keeling 

 are of a distinct kind. 



