GEOLOGICAL SURVEY OF THE TEREITORIES. 507 



Eulijma ? iNCONSPicuA, Meek. 



Shell small, conoid- snbovate; spire conical; volutions, eiglit or nine, 

 a little convex and compactly coiled; suture distiuct ; aperture appar- 

 ently subovate ; surface smooth. 



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 Uulima, the 

 specimen not being in a coudicion 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- 

 whori. It is probably not a Eulima. 



Locality and])osition. — Same as last. 



Melatmpus antiquus, Meek. 



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

 pointed ; volutions, about eight ; those of the spire very short aud nearly 

 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 laminse or folds, with sometimes one or two 

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

 and strengthened by a few tranverse ridges within. Surface showing 

 only five obscure lines of growth and presenting a somewhat polished 

 appearance. 



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



I 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 description, 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 Mith the foregoing in nearly all other 

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



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

 taceous. 



Yalyata nana, Meek. 



Shell small, depressed subglobose, or subdiscoidal; spire depressed ; 

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

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

 showing fine obscure lines of growth under a magnifier. 



Breadth of largest specimen, 0.12 inch; height about 0.08 inch. 



Compared with V. suhumhilicata,M. andH., from the 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 aperture. It also has a smaller umbilicus and a less rounded 

 ai)erture than the recent V. sincera. Its spire is more depresseil, its 

 aperture more oval, aud umbilicus rather smaller than the living species 

 V. tricarinata, var. simplex, Say. 



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

 ceous. 



