101 Descriptions of New Fluviatile Shells. • 



23. ^lelauia pupoitlea. 



Plate III. Fig. 3. 



T. ovato-conica, glabra, crassa, stramineo-virente; spira obtuse elevata ; 

 anfr. 7, subconvexis, gradatis, superioribus fusco-unifasciatis ; ultimo 4- 

 lineato; suturis valde impressis; apertura elongato-ovata, iutus albida, 

 t'asciata; labro sinuoso, columella rotundata, in sinum tenuem pro- 

 ducts. 



Shell ovate-conic, smooth, rather thick ; spire obtusely ele- 

 vated, with a decidedly convex outline, and a well impressed 

 suture ; whorls 7, convex, nearly entire at the apex ; color pale 

 green, with one linear band revolving on the spire, and four 

 broader and more distinct bands on the body whorl ; aperture 

 small, narrow-ovate, diaphanous, with four distinct brown 

 bands within ; columella rounded, not indented ; outer lip 

 curved and extended forward ; sinus small. 



Length 0.87 inch (22 millim.). Diam. 0.35 inch (9 millim.). 



Length of aperture 0.38 inch (10 millim.). 



Breadth of do. 0.17 inch (4 millim.). 



Habitat. — Alabama. 

 My cabinet. 



Obs. — This belongs to that group of which M. olivula Conrad 

 may be considered the type. From that shell it differs, how- 

 ever, in being more elongate, and less ornamented with bands, 

 as well as by its paler and less varnished epidermis. Compared 

 with M. proteus Lea it is even more elongate and less acute : 

 the aperture is entirely different, and it wants the tuberculous 

 shoulder which distinguishes that species. Its resemblance to 

 the pupae of some of the insect tribes has suggested its charac- 

 teristic specific name. 



