GEOLOGICAL SURVEY OF THE TERRITORIES. 507 



EuLiMA ? iNCONSPicuA, Meek. 



Shell small, coiioidsnbovate; spire conieal; volntions, eitrbt or nine, 

 a little convex and couipactly coiled; suture distinct; aperture appar- 

 ently subovate ; surface sn)00th. 



Length, 0.17 inch; breadth, 0.07 inch; spire with straight slope that 

 diverges at an an angle of about 22°, 



This is another form that I only refer with great doubt to Eulima^ the 

 specimen not being in a condicion to show the exact form and nature of 

 the aperture. It will be ready distinguished from the last by its more 

 convex volutions, proportionally shorter spire, and more expanded body- 

 whorl. It is i)robably not a Eulima. 



Locality and position. — Same as last. 



Melampus antiquus. Meek. 



Shell subovate, thin ; spire moderately prominent, conical, and abruptly 

 pointed ; volutions, aljout eight ; those of the spire very short and neaily 

 flat; last one large ; widest above and tapering below ; suture shallow, 

 with a slightly impressed line a little below it, around the upper margin 

 of each volution ; aperture narrow; columella and inner lip provided 

 with four very prominent laminte or folds, with sometimes one or two 

 smaller ones above these, near the top of the ajierture; outer lip thin 

 and strengthened by a few trauverse ridges within. Surface vshowing 

 only five obscure lines of growth and presenting a somewhat i^olished 

 appearance. 



Height of a small specimen, 0.43 inch; breadth, about 0.27 inch. 



1 have only seen very imperfect specimens of this shell, but, taken 

 together, they give a correct idea of nearly all of its characters. Some 

 of them are three or four times the linear dimensions of that from which 

 the above measurements were taken. 



Among the specimens from the same locality and bed, there are some 

 very large broken examples, too imperfect for detailed descrii)tion, that 

 seem to belong to a more elongated species, with a more produced spire 

 than that described above. This form, however, as far as its characters 

 can be made out, appears to agree with the foregoing in nearly all other 

 respects. If distinct, it might be called M. elongatns. 



Locality and position. — Carleton's coal-mine, near Coalville, Utah. Cre- 

 taceous. 



Yalvata nana. Meek. 



Shell small, depressed snbglobose, or subdiscoidal; spire depressed | 

 volutions three and a half, rounded; suture deep; umbilicus compara- 

 tively small; apertnre rounded suboval; surface nearly smooth or only 

 showing fine obscure lines of growth under a magnitier. 



Breadth pf largest specimen, 0.12 inch; height about O.OS inch. 



Compared with V. s2ihumbiHcata,M. and H., fromtlie Tertiary lignites 

 of the Upper Missouri country, this little shell will be readily dis- 

 tinguished, by its smaller umbilicus, more prominent spire, and more 

 oval a[)erture. It also has a smaller umbilicus and a less rounded 

 aperture than the recent V. sincera. Its spire is Jiiore depresse !, its 

 a])erture more oval, and umbilicus rather smaller than the living- species 

 V. tncarinata, var. simplex, Say. 



Locality and position. — Carleton's coal-mine, Coalville, Utah. Creta- 

 ceous. 



