Descriptions of New Fluviatile Shells. 105 



24. jflelania tecta. 



Plate III. Fig. 4. 



T. conica, tenui, nigro-fusca ; spira elevata ; anfr. 7-8, planis, supra 

 suturas carinatis ; suturis valde impresses ; apertura ovata, intus pur- 

 purascente et obscure fasciata ; columella incurva, in sinum teuuem 

 producta. 



Shell conical, thin, brown ; spire elevated ; whorls 7-8, flat, 

 "with a distinct, but not elevated carina on each at its lower 

 edge, -near the suture ; sutures very deeply impressed ; aper- 

 •ture oval, within reddish and lightly banded ; columella curved, 

 sinus small. 



Length 0.60 inch (15 millim.) Diam. 0.26 inch (61 millim.). 



Length of aperture 0.23 inch (6 millim.). 



Breadth of do. 0.14 inch (3| millim.). 



Habitat. — Ohio. 



My cab. Cab. Lye. Nat. Hist., K Y. B. W. Budd, M.D. 



Ohs. — May be compared with M. pulchella Anth., but is 

 readily distinguishable by its more slender proportions, thinner 

 texture, lighter color, and above all by its peculiarly shaped 

 whorls, which, increasing regularly, and being carinate at their 

 bases, have somewhat the appearance of the roof of a house, 

 hence its name. Lines of growth distinct ; one or two indis- 

 tinct, narrow bands are often visible on the shell ; a very neat 

 and graceful species. 



25. Melansa iuibricata. 



Plate III. Fig. 5. 

 T. conica, glabra, subcrassa, cornea ; spira elevata ; anfr. S-9, supe- 



