280 — Organic Remains of the Ferruginous 
text refers to fig. 5, which is in reality the 4. hippocrepis : this un- 
fortunate error led me into the mistake of calling the former species by 
the latter name ; as will be seen in my papers in the Journal of the 
Academy, Vol. VI. pages 88 and 113, and plate V, fig. 4. My de- 
scriptions and drawing, therefore, refer to 2. placenta. 
Great numbers of this fossil were found in excavating the Deep 
Cut of the Chesapeake and Delaware Canal. A fine specimen 
about fifteen inches in diameter, has been deposited in the collections 
of the Academy, by Mr. Hugh Lee: and the same gentleman has — 
presented another to the American Philosophical Society, nearly two 
feet in diameter. It has also been found in many parts‘of New Jer- 
sey. The figure of this fossil given by me in the Academy’s Jour- 
nal, is worse than none : that in the Annals of the Lyceum is better ; 
but both were taken from mutilated fragments. It is to be hoped 
that the more perfect specimens lately obtained will be soon accu- 
rately figured. 
2. A. hippocrepis. (Dekay.) Annals of the N. Y. Lyceum, Vol. 
2, p. 277. This species (as just mentioned,) is represented on the 
accompanying plate by fig. 5, and not by fig. 2, as stated in the text.* 
This species is of rare occurrence. I give it on the authority of Dr. 
Dekay, having never myself seen a specimen of it. 
BACULITES. Fawas. 
B. ovatus. (Say.) This is among the largest species any where 
described. Some specimens have a diameter of an inch and a quar- 
ter; one in the collection of the Academy, is four and a half inches 
in length. It is found in the blue marls of Monmouth and Burling- 
ton counties, in New Jersey, and at the Deep Cut of the Chesapeake 
and Delaware canal. The smaller individuals strongly resemble 
those from Maestricht, as figured by Faujas in his description of the 
mountain of St. Pierre. 
eo sCAPHITES. Parkinson. 
- SS. euvieri. (S: G.M.) This is one of the most perfect and 
beautiful fossils of our ferruginous sand. Its length is an inch and 
three fourths ; the diameter of the larger whorl an inch and a half. 
Since I described and figured this shell. in the journal of the Acad- 
_* Fig, 4 of the same plate should be jig. 5, and fig. 3 should be fig. 4. Without 
these corrections, (which Dr. Dekay has himself communicated to me,) the descrip- 
tions and drawings are unintelligible. 
