1853.] 377 
Unio Cumingit is the same with my Unio cucwmoides—is therefore asynonym to 
the latter. Prof. Dunker had not had access to my descriptions of the above 
species when he described in the Zeitschrift fir Malakozoolgie, 1846 and 1852.” 
Mr. Girard read two papers, entitled severally ‘Observations upon 
the American species of the genus Hsox,” and “ Note upon a nest con- 
structed by Catfishes ;’? both of which were referred to the following 
Committee: Major Le Conte, Dr. Zantzinger and Dr. Ruschenberger. 
Dr. Leidy offered the following observations : 
In the Proceedings of the Academy for 1851, page 326, some remains of extinct 
Cetacea are indicated as having been obtained from the green sand of New Jer- 
sey. At the request of Sir Charles Lyell, I have directed more particular atten- 
tion to the specimens with a view to determining whether they are true cretace- 
ous fossils. 
The species named Priscodelphinus Harlant was proposed upon a single verte- 
bra which had been previously described by Dr. Harlan, as having belonged to 
the saurian genus Plesiosaurws. In regard to the cetacean character of the bone 
there is no doubt. The specimen was obtained from the marl of Mullica Hill, 
which certainly belongs to the green sand formation of the cretaceous series. 
But as we know that remains of recent animals occasionally find their way into 
the marl,* the vertebra under consideration may also be accidental in its posi- 
tion. In texture the specimen has more the appearance of most of the Miocene 
Cetacean fossils, than it has the bones of the saurians belonging to the marl, 
although there is no miocene formation at Mullica Hill. 
The species Priscodelphinus grandevus was proposed on two vertebre, which 
were found by Dr. J. Thomas, in the Shiloh marl pits near Jericho, Cumberland 
Co., and this Mr. T. A. Conrad, who recently visited the locality, informs me 
is a Miocene formation. 
Mr. Conrad has presented me with an outline drawing (of which the accom- 
panying wood engraving isa copy,) of a tooth, discovered by Mr. 
Samuel A. Wetherill in the green sand, of the cretaceous series, 
near Burlington, New Jersey. The specimen was given to Mr. 
Conrad, who made the drawing indicated, and afterwards 
loaned it to an acquaintance, from whom he has not been able to 
obtain it again. The figure represents a double-fanged tooth, 
with a crown divided into five prominent lobes. It is, without 
doubt, the tooth of a mammal, and resembles verv much one of 
the posterior molars of Stenorhynchus serridens, Owen, an ani- 
mil of the seal tribe. It may have belonged to acetacean allied 
to Bastlosaurus, but until further evidence is obtained, I propose 
to call the species indicated by the tooth Stenorhynchus vetus. 
Prof. Francis $8. Holmes, of Charleston, 8. C., has sent for my inspection a 
collection of mammalian fossils, among which are the remains of several cetace- 
ans as foilows: 
1. A nearly entire tooth, with fragments of five others, from the sands of Ash- 
ley River, S. C. These teeth may be saurian in character, but I suspect them 
to belong to a cetaceous genus of the family Delphinide. The nearly entire spe- 
cimen resembles in general form the teeth of the dolphins. It is about three 
inches long, and is curved ; andit hasa conical crown capped with enamel, which 
forms a salient ridge on two sides. The fang is long and conoidal; and just be- 
yond the crown is gibbous. On several of the specimens the enamel is smooth, 
but on the others is longitudinally corrugated. For the animal to which these 
teeth belonged the name of Colophonodon Holmesw is proposed. 
2. Twelve imperfect teeth, averaging an inch in length, from the same locality 
as the former, belonging to the genus Phocodon? Agassiz. 
#See Proceedings, vol. v, 333. 
