M E L A T M A . 



Plate III. 



Species 16. (Mus. Anthony.) 



Melatoma amplum. Mel. testa subgloboso-ovatd,fiaves- 

 cente-olivaced,fasciis triius virente-nigris angustis dis- 

 tantibus cingulald, spird breviusculd, acuminata, im- 



fractibus convexis, leevibus ; aperturd obloi/go-ovatd, 

 fissurd profundi!. 



The ample Melatoma. Shell somewhat globosely ovate, 

 yellowish-olive, encircled with three narrow, distant, 

 greenish-black bands, spire rather short but acumi- 

 nated, whorls convex, smooth ; aperture oblong-ovate, 

 fissure deep. 



Gyrotoma ampla, Anthony, Pro. Acad. Nat. Sci. Philadel- 

 phia, 1860, p. 66. 



Hab. Coosa Paver, Alabama, United States. 



The spire of this elegant little species, though short, is 

 rather sharply acuminated ; the fissure is very conspicu- 

 ously developed. 



Species 17. (Mus. Anthony.) 



Melatoma Wetumpkaense. Mel. testa ovatd, abbre- 

 viato-pyramidali, olivaced, virenie-nigro spiraliter fu- 

 niculatd, anfractibus superne declivibus, medio angulato- 

 carinatis ; aperturd parviusculd, ad bashi subeffusd, 

 fissurd mediocri. 



The Wetumpka Melatoma. Shell ovate, shortly pyra- 

 midal, olive, spirally corded with greenish-black, 

 whorls sloping round the upper part, angularly keeled 

 round the middle ; aperture rather small, slightly ef- 

 fused at the base, slit moderate. 



Sckizostoma Wetumpkaense, Lea. 



Gyrotoma Wetumpkaense, Anthony. 



Hab. Coosa River, Alabama, United States. 



A well-defined species, prominently angularly keeled 

 round the middle. 



Species 18. (Mus. Anthony.) 



Melatoma globosum. Mel. testa globoso-ovald, livido- 

 olioaced, spird breviusculd, acuta subimmersd, anfrac- 

 tibus declivi-convexis, multicarinatis ; aperturd angus- 

 te ovatd, ad basin subeffusd, fissurd prof undd. 



The globose Melatoma. Shell globosely ovate, livid- 

 olive, spire rather short, sharp, a little immersed, 



whorls slopingly convex, many-keeled ; aperture nar- 

 rowly ovate, a little effused at the base, fissure deep. 



Sckizostoina globosa, Lea. 



Gyrotoma globosa, Anthony. 



Hab. Alabama, United States. 



The whorls of this species are more keeled than those 

 of the preceding, and not angularly produced round the 

 middle. 



Species 19. (Mus. Anthony.) 



Melatoma nucula. Mel. testa obtuse conicd fnlvo-oli- 

 vaced, anfractibus convexis, leevibus ; aperturd anguste 

 ovatd, ad basin subeffusd, fissurd profunda. 



The little nut Melatoma. Shell obtusely conical, 

 fulvous-olive, whorls conxex, smooth ; aperture nar- 

 rowly ovate, a little effused at the base, fissure deep. 



Gyrotoma nucula, Anthony, MS. 



Hab. Coosa River, Alabama, United States. 



Chiefly distinguished by the simplicity of its characters, 

 the shell being neither sculptured nor banded. 



Species 20. (Fig. a, b, Mus. Anthony.) 



Melatoma Alabamense. Mel. testa conico-ovald, fulvo- 

 fuscd, anfractibus convexis, multicarinatis, carinis ob- 

 tusis, obsolete plicato-nodulosis ; aperturd anguste ovatd, 

 fissurd profunda. 



The Alabama Melatoma. Shell conically ovate, ful- 

 vous-brown, whorls convex, many-keeled, keels ob- 

 tuse, obsoletely plicately noduled ; aperture narrowly 

 ovate, fissure deep. 



Sckizostoma Alabamensis, Lea. 



Gyrotoma Alabamensis, Anthony. 



Hub. Coosa River, Alabama, United States. 



Encircled with numerous obtuse keels, which present 

 faint indications of being noduled. 



Species 21. (Mns. Anthony.) 

 Melatoma ellipticum. Mel. tesld oblougo-ovatd,fiaves- 

 vente-olivuced, fisciis tribus latis virente-nigris cingu- 

 latd, spird subproductd, obtusd, anfractibus plano- 

 convexis, Iambus, versus apicem obsolete rude plicatis ; 

 aperturd anguste ovatd, fissurd profunda. 



April, 1861. 



