fl6 [March, 



Fnsus CcLBERTSONi. Shell elongate fusiform ; spire elevated conical, acute ; 

 Tolutions about seven, convex, increasing gradually from the apex, and crossed 

 nearly at right angles to the suture by six or seven strong rounded folds, which 

 gradually become obsolete on the last near the aperture ; last volution tapering 

 gracefully and obliquely into the canal, which is of moderate length ; surface 

 marked by irregular lines of growth, crossed by flattened or rounded lines, 

 somewhat larger than the spaces between ; suture distinctly impressed, and 

 when viewed from aVjove is seen to deviate from a regular curve in following 

 the waving outline of the folds ; aperture lanceolate or narrow oval, acutely 

 angular above and tapering gradually below. Length about 1.68 inches, breadth 

 .50 inch ; length of aperture and canal about .90 inch, breadth .23 inch ; apical 

 angle convex, divergence 28. 



We dedicate this species to Mr. Alexander Culbertson, of the Am. Fur Co. 



Locality and j^osition. Same as preceding. 



Fusus FLEXUOCOSTATDS. Shell fusiform ; spire somewhat elevated, acute at 

 the apex ; volutions six to six and a half, convex, traversed by strong, simple, 

 flexuous folds nearly equalling the spaces between, and terminating above in 

 gmall nodes so as to leave a shallow spiral groove below the suture; last whorl 

 somewhat ventricose ; surface ornamented by distinct lines of growth, crossed 

 by snirtll, elevated, thread-like, revolving lines, equal the spaces between on the 

 upper part of the volutions, but more distant on the lower part of the last one; 

 between the revolving lines and parallel with them, fine striie may be seen by 

 the aid of a magnifier; suture unknown ; aperture oval or ovate. Length 1.05 

 inches, breadth .61 inch ; length of aperture exclusive of canal .48 inch, breadth 

 .30 inch ; apical angle 46. 



Locality and position. Moreau river. No. 5 of series. 



Fusus Newbekrti. Shell fusiform, thick ; spire conical ; volutions five, 

 flattened or concave above, convex below and ornamented round the middle 

 with a row of more or less prominent nodes, which are sometimes prolonged 

 on the last one into indistinct folds below; surface ornamented by irregular 

 flexuous lines of growth, crossed by round, elevated, thread-like, revolving 

 lines, sometimes greater and sometimes less than the spaces between ; 

 suture linear ; aperture narrow ovate, angular above and scarcely distinct from 

 the short canal below ; outer lip thin or bevelled ; inner lip closely spread upon 

 the columella. Length 1.43 inches, breadth .81 inch ; length of aperture (in- 

 cluding the canal) .87 inch, breadth .32 inch ; apical angle convex, divergence 

 55. 



We dedicate this species to Dr. J. S. Newberry, of Cleveland, Ohio. 



Locality and position. Moreau river and Fox Hills. No. 5 of series. 



Pyrula Bairdi. Shell pyriform ; spire depressed ; volutions five, rapidly in- 

 creasing from the apex, flattened or slightly concave above and on the outside ; 

 last one large and ventricose, ornamented on the outside by two to three more 

 or less prominent, revolving, nodose carina?, only the upper of which is visible 

 on the spire ; surface marked by strong lines of growth, crossed by numerous 

 elevated revolving lines, less than the spaces between, and sometimes assuming, 

 on the outer and lower part of the last volution, the size of more distinct ridges; 

 suture narrow, channeled ; aperture ovate, abruptly contracted into the long- 

 canal below; columella tortuous, and deeply curved round the aperture ; outer 

 lip bevelled ; inner lip thinly spread over the columella round the aperture, but 

 leaving an umbilical groove about half way down the canal. Length 3.50 inches, 

 breadth .2 inches ; length of aperture (including the canal) .3 inches, breadth 

 1.08 inches; apical angle nearly regular, divergence 114. 



Dedicated to Prof. Spencer F. Baird, of the Smithsonian Institution. 



Locality and position. Same as last. 



Fasciolaria cretacea. Shell small elongate, fusiform ; spire elevated conical ; 

 Tolutions five to six, convex, last one a little more than half the entire length of 



