240 TRANSACTIONS OF THE WAGNER FREE 



Chesapeake Miocene of North Carolina, at the Natural Well, Duplin 

 Co., Willcox and Burns; Wilmington, Burns; Mrs. Purdy's and Mrs. 

 Guion's marl-beds, Cape Fear River, C. W. Johnson. 



This form differs from the typical granifera in fineness and closeness of 

 its spiral threads much as Nassa consensa Rav. differs from N. antillarnm. 

 If constant these characters would entitle it to specific rank, but as I find 

 occasional specimens with alternate coarse and fine lines, I conclude it is 

 merely a variety of /. granifera. As the latter is the most abundant and 

 evidently the normal form, and has been figured, I retain the specific name, 

 rather than the present one, for the type. 



Genus NASSA Lamarck. 



Section Alectrion Montfort. 



These fossils differ from those referred to Ilyanassa by their sharply 

 constricted base, strong siphonal fasciole and obviously nassoid characters, 

 etc., recalling many of the exotic recent species. Mr. Conrad's specimens in 

 several instances were immature or did not possess the normal reflected lip 

 and labial callus, for which reasons he was mistakenly led to refer them to 

 Ptychosalpinx or Paranassa. 



Nassa harpuloides Conrad. 



Buccinum harpuloides Conr., Proc. Acad. Nat. Sci. for 1843, p. 326, 1844. 

 Paranassa harpuloides Conr., Am. Journ. Concli. iii. p. 264, pi. 19, fig. 7, 1867. 



Tritia harpuloides Conr., Proc. Acad. Nat. Sci. 1862, p. 562. 



Tritia scalaris Conr., Proc. Acad. Nat. Sci. Phila. for 1862, p. 286 ; not Nassa scalaris 

 Borson, 1825, nor N. scalaris A. Adams, 1851. 



Chesapeake Miocene of Virginia in the vicinity of Yorktown, Conrad, 

 Harris and Darton ; of the Cape Fear River, North Carolina, at Mrs. Purdy's 

 and Mrs. Guion's marl-pits, C. W. Johnson. 



This fine species is readily recognized, even when in poor condition, by 

 its square-sided whorls, elevated spire, and the fact that the fine spiral striation 

 above the shoulder of the whorls is laid obliquely to the suture and not par- 

 allel to it, without reference to the undulations caused by passing over the 

 ribs. When mature it has a heavy labial callus, subsutural ridge, thickened 

 lirate and somewhat reflected outer lip. 



Nassa scalaspira Conrad. 

 Ptychosalpinx scalaspira Conr., Am. Journ. Conch iii. p. 263, pi. 19, fig. 4, 1867. 



Chesapeake Miocene of Virginia and of North Carolina, at the Natural 

 Well, Duplin Co., and various places on the Cape Fear River. 



This is distinguished from the preceding form by its shorter and more 

 acute spire, its inflated last whorl, and by the fact that the spiral sculpture on 



