AlU’ENDIX. 
oO 1 
Established on a portion of tlie ramus of the mandible containing al- 
veoli for four teeth, and exhibiting a considerable part of the symphysis- 
mandibuli ; several cervical, dorsal, and lumbar vertebrae, with fragments 
of ribs and other bones. They were found by the writer near together on 
the surface of a rather small pile of marl of the Miocene of Wayne 
County. 
The mandibular ramus is rather slender, but thick, and the symphysis 
is short. Though the extremity is broken away on the inner side. The 
distal surface appears on the outer side. The alveoli are large, circular in 
section, separated by rather weak septa, and are but slightly oblique. 
Their form, size and position are quite similar to that seen in the genus- 
O'rca. 
The cervical vertebrae from the fifth posteriorly, are separate. The 
fourth or fifth of the series, is round in the section of the entrum ; and 
of very small fore and aft diameter. The vertebral canal is not quite en- 
closed by well developed, flat diaridparapophyses. The lumbro sacral 
vertabrae are not elongate, but intermediate as in the Delphinapteri 
[Belugas.) The diapophyses are flat. Diameter of centra, two inches ;■ 
length a little greater. Diameter of centrum of cervical, two inches.- 
Depth of ramus at fourth alveolus from distal extremity 18 lines. Epiphy- 
ses all co-ossified. 
The large separation of the cervical vertebrae, distinguishes this Del- 
phinoid as allied to Delphinapterus, or the Belugas of the colder regions 
of the modern ocean, though the anterior may be found hereafter to be' 
more consolidated than in them. The character of the dentition is more 
powerful than in the existing species, and approaches that of Orca, though* 
weaker than most of the known species of that genus. Its size was pro- 
bably that of the average of the wdiite whales, about thirteen feet. It 
might be mentioned in this connection, that I have recently become ac- 
quainted with an Orca, probably from the warmer parts of the American 
Atlantic coasts in which, only four cervical centra have coossified centra, 
and the fifth is attached by the neural arch only. The cranium measures- 
32 inches in length. 
Piiyseter vetus. Leidy. Physeter antiguus, Eeidy, not Gervaisi- 
Catoclon vetus. Leidy, Extinct Mamm. Dakota and Nebraska. 
Miocene. 
Orycterocetus corn utidens. Leidy. Synopsis N. Am. Mamm. in 1 
Ext. Mamm. Dakota and Nebraska. Proc. A.N. Sci. Phil. 1856 , 225 , 
Emmons Geol. Surv., N. 0. 1S56 210-1 figs. 0. guadratidens, Leidy 
k c. Emmons 1. c. Miocene,- Pitt Co., and Cape Pear R-iveiv 
