MELATOMA.— Plate III. 



The elliptic Melatoma. Shell oblong-ovate, yellow- 

 ish-olive, encircled with three broad greenish-black 

 bauds, spire rather produced, obtuse, whorls flatly 

 convex, smooth, faintly rudely plicated towards the 

 apex ; aperture narrowly ovate, fissure deep. 



Gyrotoma elliptica, Anthony, MS. 



Hab. Coosa River, Alabama, United States. 



A well-defined species, though partaking of the typical 

 characters of some others. 



Species 22. (Fig. a, b, Mus. Anthony.) 



Melatoma bulbosum. Mel. testa globosd, fiavescente-oli- 

 vaced, virente-nigro trifasciatd, spirdparvd, subacute 

 acuminata, anfraotibus rotundatis, superne obsolete 

 oblique plicatis ; aperturd ovatd, fissurd profunda. 



The bulbous Melatoma. Shell globose, yellowish- 

 olive, encircled with three bands of greenish-black, 

 spire small, rather sharply acuminated, whorls 

 rounded, faintly obliquely plicated round the upper 

 part ; aperture ovate, fissure deep. 



Gyrotoma bullosa, Anthony, Pro. Acad. Nat. Sci. Phila- 

 delphia, I860, p. 65. 

 Ilab. Coosa River, Alabama, United States. 



A short globose species, with a short sharply acuminated 

 spire. 



Species 23. (Mus. Anthony.) 



Melatoma Showalteri. Mel. testd ovatd, obtuse conicd, 

 sordide fused, anfraotibus convexis, irrcgulariter bica- 

 rinatis, carinis obtusis obsolete nodulatis ; aperturd 

 ovatd, fissurd profunda. 



Showaltek's Melatoma. Shell ovate, obtusely conical, 

 dingy -brown, whorls convex, irregularly two-keeled, 

 keels obtuse, faintly noduled ; aperture ovate, fissure 

 deep. 



ScJdzostoma Showalteri, Lea. 



Gyrotoma Showalteri, Anthony. 



Hab. Coosa River, Alabama, United States. 



A dingy brown, black-banded shell, encircled round the 



middle with two faintly noduled keels. 



