GEOLOGICAL SURVEY OF THE TERRITORIES. 505 



some. The specific name is given ia honor of my friend, William M. 

 Gabb, the paleontologist. 



Locality and position. — Coalville, Utah; from Cretaceous beds below 

 the lower htavy bed of coal mined at that place. 



Fusus (Neptunea?) Utahensis, Meek. 



Shell of moderate size, short fusiform ; spire rather depressed, conical ; 

 volutions about four ; those of the spire a little convex ; last one large 

 and ventricose, rounded or very slightly flattened around the middle 

 and contracted rather rapidly below into a narrow canal that is longer 

 than the spire, and more or less bent to the left; aperture rhombic, 

 angular above and narrowed and prolonged into the canal below. Sur- 

 face, (as determined from a cast in sandstone,) with obscure vertical 

 ridges, about twelve of which may be counted on the penultimate volu- 

 tion, while on the last, or body-whorl, they become nearly or quite obso- 

 lete. ^(Revolving lines probably also marked the surface of the shell, 

 thougli no traces of anything of the "kind are seen on the cast, except- 

 ing a shallow furrow above the suture on the volutions of the spire.) 



Length, including canal, about 1.90 inches ; breadth, 0.91 inch ; angle 

 of spire, about 07°. 



As in the last, we have not the means of determining the generic 

 characters of this species with any degree of certainty, and merely i>lace 

 it provisionally in the genus Fusns with Neptunea in parentheses to in- 

 dicate that it may be found to belong to that group. It is a rather 

 decidedly larger shell than the last, with a distinctly less elevated spire, 

 and more obsC;ure vertical ridge or varices. 



Locality and position. — Coalville, Utah ; from "Chalk Hill," considera- 

 bly above the lower heavy bed of coal mined there. Cretaceous. 



TuRBONiLLA (Chemnitzia?) Coalvillensis, Meek. 



Shell elongate-conical; volutions ten or eleven, moderately convex; 

 last one not much produced below, rounded or sometimes obscure!}' sub- 

 angular around the middle; suture well defined; aperture rhombic- 

 suboval, being angular above and apparently a little so below; inner 

 lip slightly thickened, ratherdeeply arched, a little reflected, and closely 

 appressed below ; outer lip thin. Surface ornamented by rather strong, 

 simple, regular, nearly or quite straight vertical ridges, crossed by regu- 

 larly disposed revolving lines, (about ten or eleven of the ridges and 

 five or six of the revolving lines being seen on each volution of the 

 spire ;) while only the revolving lines are continued below the middle 

 of the body volution. 



Length of a large specimen, 1 inch; breadth, 0.40 inch; angle of 

 spire, from 20° to 25°. 



None of the specimens of this species yet seen are quite perfectly pre- 

 served at the base of the aperture. Some of them look as if there had 

 been a slight angularity there, while others, difl'eringiu no other respect, 

 j)resent appearances that leave room for doubt on this point. In some 

 of its characters this shell reminds one of the fresh-water Goniohasis, to 

 which I was at one time much inclined to refer it, and I am hardly 

 quite sure yet that it may not have to take the name Goniohasis Coa'l- 

 villcnsis. Many authors refer very similar shells to CItcmn itzia, but it has 

 not so large and produced a body volution and aperture as the forms 

 to which Mr. Conrad and Dr. Stoliczka propose to apply that name.* 



*Tbe o;enns Chpmnitzia,(VOvh\<j!;ny, as ori/jinaUif proposed, is gciu'rally regarded aa syn- 

 onyms with Tttrboiiilla, Risso; but d'Orbiguy biujself, at a later date, seems to have 

 designed to use it for another group. 



