GASTEROPODA OF THE LOWER GREEN MARLS. 143 
very evident there is an error from mixture of specimens in the tray, making 
the locality somewhat doubtful, as Vincentown would probably be at the 
base of the Upper Marls. The Haddonfield example is from the very base 
of the Lower Marls, and its position unquestioned. 
TURRITELLA ENCRINOIDES. 
Plate xvi, Figs. 19-22. 
Turritella encrinoides Morton: Synopsis, p. 47, Pl. m1, Fig. 7; Gabb, Synopsis, p. 
90; Meek, Check List Cret. and Jur. Foss., p. 18; Geol. N. J.. Newark, 1868, 
p. 729. 
Shell much elongated and rather slender, apical angle in uncompressed 
specimens from 15° to 20°; volutions compact, numbering seven in a speci- 
men which measures 1} inches in length, flattened or only slightly convex 
on their surfaces, with narrow suture lines in the cast and sharply angular 
basal angle, but on fragments which preserve the shell in part at least, they 
are slightly depressed. The surface is marked by numerous spiral lines 
which vary much in size and strength, there being two principal ones, one 
near the upper and the other near the lower edge of the volution, with an 
indefinite number of smaller ones; aperture, as indicated by the form of 
the cast, subquadrangular, nearly straight on the outer margin and angular 
above and below. 
The species differs quite strongly from 7. vertebroides in the form of 
the volutions and the less distinctly marked sutures, and in the greater 
number of spiral lines. One of the fragments used in this description and 
figured on our plate appears to be that used by Dr. Morton and figured by 
him. It retains the shell to some extent, but is very imperfect. Among 
collections obtained from the State survey are many internal casts which 
show the volutions to be more compact than in ZT. vertebroides, and very 
much more angular, with close sutures and sharp upper and lower angles. 
Formation and locality: Dr. Morton’s specimen is marked ‘Cretaceous, 
N. J.” Under his notice of it in the Synopsis, p. 47, he says it occurs with 
T. vertebroides, and although he gives it a name, gives no description or 
locality except ‘“‘New Jersey and Alabama.” Other specimens in the State 
collection are marked “Vincentown, N. J.,” and are from collections made 
