CEPHALOPODA OF THE CRETACEOUS MARLS. 265 
D’Orbigny in his Prodrome, p. 214, cites it as S. subreniformis Morton. 
To this Mr. Gabb in bis Synopsis under subreniformis takes exception. To 
me it is quite evident that D’Orbigny intended this name as a substitute 
only for Morton’s name, and that he accidentally omitted to state in con- 
nection with it that it was so meant; as in parenthesis he says (non Brug. 
1790). Lhave, however, been unsuccessful in a search for further evidence 
of a Scaphites reniformis Brug. elsewhere. 
I have givenas good a copy of Dr. Morton’s figure of his S. reniformis 
as possible, in order to aid in the search for other specimens of the species, 
or the identification of the type should it be discovered. 
Formation and locality: The type specimen came from a friable maz, 
at Grove Mill, near Bordentown, New Jersey, and would pertain to the 
Lower Marl Bed. 
SCAPHITES IRIS. 
Plate xiv, Figs. 4-7. 
Scaphites iris Conrad: Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 3, p. 335, PI. 
Xxxv, Fig. 23; Gabb, Synopsis, p. 32; Meek, Geoi. Surv. N. J., 1868, p. 730. 
Scaphites Conradi Gabb: Synopsis, p. 32. 
Mr. Meek gives this species in his list of New Jersey fossils published 
in the Geol. Report for 1868, but does not include the name in his Smith- 
sonian Inst. Check List. Mr. Gabb cites it as a synonym of S. Conradi, to 
which type it undoubtedly belongs and is somewhat closely allied. Mr. 
Conrad in his original description says it differs greatly in the character of the 
septa. The septum which he describes as existing in a free or unfilled con- 
dition has since been destroyed, and the only one which can now be seen 
is so extremely small as to be entirely unreliable for comparison, and the 
external form of the types, the only ones known, differs in some essential 
particulars. 
The species may be characterized as follows: Shell small to medium 
size, almost circularly discoid, with laterally compressed volutions, espe- 
cially the inner coils, which are flattened on the sides and almost grooved 
on the back from the prominence of two lines of nodes along the dorsum. 
Body volution proportionally more expanded in one of the types, appearing 
somewhat inflated on the sides along the horizontal portion, the inner whorls 
