616 The American Naturalist. [July, 
Choneziphius liops Leidy. | S. C. 
n celops Leidy. S. C. 
" macrops Leidy. S. C. 
x chonops Leidy. S. C. 
Mesoplodon prorops Leidy. S. C. 
DELEON DA [KE uem 5 2 
EL, vermontanus Thompson. Vt., Canada. 
orcinus Cope. N.C 
Dephinus occiduus Leidy. Cal. 
: BALENIDE, 2.2.0200... 208 
Cetotherium pusillum Cope. Md. 
expansum Cope. Md. 
priscum Leidy. Va. 
> polyporum Cope. N.C. 
mysticetoides Emmons. N. C. 
F cephalus Cope.- Md. 
leptocentrum Cope. Va. 
Balenoptera paleatlantica Leidy. Va. 
* davidsonii Cope. Cal ` 
Mesoteras kerrianus Cope. N. C. -— 
Total nembe UE ale: 5. o eor eoe veis „52 
EXPLANATION OF PLATES. 
PLATE XX,—Choneziphius semijunctus Cope. One-tenth natural size. 
From photographs of the type in the Museum of Charleston, S. C., taken by 
. Vogdes, U.S.A. Fig. 1. Cranium from above; 2, cranium from 
below; 3, extremity of the mandible, with teeth 
PLATE XXI.— Delphinapterus leucas Pallas. One-thirteenth natural size. 
From a skeleton in the Museum of the Academy of Natural Sciences of 
Philadelphia, obtained by Dr. I. I. Hayes, from Baffin’s Bay. Type of 
Beluga concreta Cope. 
PLATE XXIL-— Cetotherium cephalus Cope. Restoration, one-eighteenth 
, natural size; the portions shaded are the actual specimens of one individual 
found in the Miocene of Maryland, and now in the Museum of the Academy 
of Natural Sciences of Philadelphia. Described by E. D. Cope in its Pro- 
ceedings, 1867, p. 148. 
PLATE XXIIL— Balena cisarctica Cope. Type specimen as mounted in 
the Museum of the Academy of Natural Sciences of Philadelphia; one- 
thirty-seventh natural size. Fig. 1, side view; Figs. 2, 3, 4, periotic bones 
from side, end, and below ; Fig. 5, cervical vertebrze, oblique inferior view. 
