190 CRETACEOUS PERIOD. 



Mr. Meek described this species from Cretaceous strata at Coalville, 

 Utah, together Avith N. hcllatula, another species possessing similar sub- 

 generic characters, to designate which he proposed the subgeneric name of 

 Velatella. 



Position and locality. — Strata of the Cretaceous period; south of Last 

 Bluff, Utah. 



Order PECTINIBEANCHIATA. 



Stjbokder T^NIOGLOSSA. 



Family APOREHAIDiE. 



Genus ANCHUEA Conrad, 18C0. 



Anchura ? fusiformis Meek. 

 Plate XVIII, fig. 4 a. 

 Anchura ? fusiformis Meek, 1874 (Mauuscript), Geol. Expl. 40th Parallel. 



SBell of medium size ; body subfusiform ; spire somewhat elongated 

 and tapering to a point; volutions eight or nine, convex ; suture impressed; 

 last volution moderately large, without a revolving angle. Wing moderately 

 large, broad-oblong ; outer border nearly straight and nearly parallel with 

 a line produced from the slope of the opposite side of the spire ; its posterior 

 end terminating in a somewhat slender, slightly curved, sharp, backward- 

 projecting spine-like process ; its anterior end terminating in a somewhat 

 distinct, but obtuse, angle ; posterior border of the wing having a somewhat 

 regular concave curve between the base of the spine-like process and the 

 spire ; anterior border of the wing curving with slight irregularity from the 

 anterior angle of the outer border to the anterior canal ; this canal is mod- 

 erately long and slender. 



Test thin and delicate, except at the borders of the wing, where it is 

 considerably thickened, and there are also some indications upon one of our 

 examples of a thickening of the posterior end of the inner, lip. 



Surface marked by fine, distinct striae and numerous, somewhat irregular 

 undulations of growth. Crossing these striae of growth, the surface is covered 

 with minute revolving striae of uniform size, giving it a delicately-ornamented 

 appearance under the lens. Upon some of our examples, however, the 



