GASTEROPODA OF THE LOWER GREEN MARLS. ray 
TURRITELLA HARDIMANENSIS. 
Turritella Hardemanensis Gabb: Jour. Acad. Nat. Sci., Phila., vol. 4, 2d ser., p. 
392, Pl. uxvint, Fig. 15; Synopsis, p. 90; Meek, Check List Cret. and Jur. 
Foss., p. 18; Geol. N. J.. Newark, 1868, p. 729. 
Mr. Meek cites this as a New Jersey species in his list as above quoted, 
and in the Smithsonian check list gives only New Jersey as its habitat. 
Mr. Gabb states, under his original deseription, that he has seen a ‘very 
young” specimen of it in the cabinet of Mr. Lea, obtained from the Rip- 
ley group, in New Jersey. This I presume means either Crosswicks, or 
more probably Haddonfield, New Jersey, as Mr. Lea had specimens from 
this latter place. 1 have not seen the specimen in question, and as it is 
said to have been a very young specimen, fear there may have been some 
mistake in the identification; especially as the species, so far as known 
from the type, is a small one anyway. Young Turritellas are not the 
most reliable material for specific determinations, although it is possible 
that in this case it may have been correct. The beds at Haddonfield 
are at the very lowest horizon yet yielding undoubted Cretaceous fossils 
in New Jersey, and have lithological features remarkably similar to those 
of the Ripley group of the more southern States, so there is a double 
chance of error in this case. 
TURRITELLA LIPPINCOTTI, n. sp. 
Plate xvi, Figs. 23, 24. 
Shell of medium size, rather rapidly tapering, the apical angle being 
about 20° or less. Volutions flattened on the surface in the direction of 
the spire, with scarcely perceptible suture lines where the shell is pre- 
served, and only very moderate ones in the cast; their form in a section 
being trapezoidal, the upper and lower outer angles being rather sharply 
angular, even in an internal cast; basal face scarcely convex; volutions 
numerous, a fragment measuring not quite 2 inches in length, with a 
diameter at the lower end of five-eighths of an inch, retaining seven, with 
space at the upper portion for about five more. Surface of the shell 
marked, in the only specimen which preserves it, by fine rounded spiral, 
thread-like lines over the entire surface. 
The species resembles, in its general contour, 7. vertebroides Morton, 
but tapers somewhat more rapidly. It differs from that one, and all the 
MON, XVILI——LO 
