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Cacomitl Cat — Part 2
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DD. No perceptible soft under fur; molars 1/1.
E. Back teeth separated from last premolar by a considerable space..... EUMETOPIAS, 211
EE. Back teeth in a continuous series..... ZALOPHUS, 211
CC. Hind flippers permanently directed backward.
D. A hood-like appendage on the head of the male; teeth, i 2/1, c 1/1, p 4/4, m 1/1..... CYSTOPHORA, 218
DD. No hood on the head of the male; teeth i 3/2, c 1/1, p 4/4, m 1/1.
E. Facial part of head very long; whiskers crenulated. HALICHCERUS, 218
EE. Facial portion of head short, about equal to the brain-case; whiskers not crenulated.
F. Muzzle broad, forehead convex..... ERIGNATHUS, 218
FF. Muzzle narrow, forehead sloping gradually. PHOCA, 215-217
II. AERIAL MAMMALS WITH THE FORE LIMBS MODIFIED FOR FLIGHT AND COVERED BY AN ELASTIC MEMBRANE WHICH EXTENDS DOWN THE SIDES OF THE BODY AND BETWEEN THE HIND LEGS (BATS).
A. Tail wanting; a curious leaf-like appendage on the nose; teeth, i 2/2, c1/1, p 2/2, m 2/3..... ARTIBEUS, 194
AA. Tail present; no appendage on the nose.
B. Tip of tail projecting beyond the interfemoral membrane; teeth, i 1/3, c 1/1, p 2/2, m 3/3 ..... NYCTINOMUS, 195
BB. Interfemoral membrane reaching to the tip of the tail.
C. Interfemoral membrane completely covered with fur; teeth, i 1/3, c 1/1, p 2/2, m 3/3..... LASIURUS, 203-205
CC. Interfemoral membrane not completely furred.
D. Ears very large united by their bases; teeth, i 2/3, c 1/1, p 2/3, m 3/3. CORYNORHINUS, 196
DD. Ears not united by their bases.
E. Upper incisor teeth one on each side close to the canine.
F. Size large (length 5.60 ins.); teeth, i 1/3, c 1/1, p 1/2, m 2/3. DASYPTERUS, 206
FF. Size small (length 3.70 ins.); teeth the same. NYCTICEIUS, 206
EE. Upper incisors two on each side.
F. Color of fur black with white tips; teeth, i 2/3, c 1/1, p 2/3, m 3/3. LASIONYCTERIS, 202
FF. Color of fur brown or yellowish brown.
G. Size large (length 4.60 ins.); teeth, i 2/3, c 1/1, p 1/2, m 3/3. VESPERTILIO, 200
GG. Size small (length 3.40 ins.).
H. Teeth, i 2/3, c 1/1, p 2/2, m 3/3..... PIPISTRELLUS, 201
HH. Teeth, i 2/3, c 1/1, p 3/3, m 3/3..... MYOTIS, 196
III. MAINLY TERRESTRIAL MAMMALS WITH FOUR WELL-DEVELOPED LEGS, ADAPTED FOR WALKING. (The hind feet are webbed and somewhat flipper-like in the Sea Otter, and in the Flying Squirrels there is an expansion of skin on the sides of the body for flying)
A. Body covered by a bony carapace or shell; teeth, 7/7-8/8..... TATU, 9
AA. Body covered with hair or fur.
B. Tail naked and prehensile; ears naked; female with teats opening in a pouch on the belly in which the young are carried; teeth, i 5/4, c 1/1, p 3/3, m 4/4..... DIDELPHIS, 4-8
BB. Tail not prehensile; ears not naked; no marsupial pouch.
C. Toes terminating in hoofs.
D. Form pig-like; teeth, i 2/3, c 1/1, p 3/3, m 3/3..... TAYASSU, 30
DD. Form not pig-like; males (and females of same species) with horns.
E. Horns hollow, not branched, fitting over a solid bony core; teeth, i 0/4, c 0/0, p 3/3, m 3/3.
F. Shaggy mane over the head and shoulders..... BISON, 66
FF. Long hair over the whole body; horns massive, OVIBOS, 65
FFF. Form sheep-like; hair short; horns spiral.. OVIS, 61-65
FFFF. Form goat-like, hair long, pure white.. OREAMNOS, 57
EE. Horns hollow, forked, and shed periodically; teeth, i 0/4, c 0/0, p 3/3, m 3/3..... ANTILOCAPRA, 54
EEE. Horns solid branching antlers, which are shed periodically ; teeth, i 0/4, c 0/0-1/0, p 3/3, m 3/3.
F. Nose completely covered with hair.... RANGIFER, 47-54
FF. Nose not completely haired.
G. Antlers broadly palmate or flattened.... ALCES, 43
GG. Antlers not flattened.
H. Animals medium or small; antlers not more than twenty-five inches long..... ODOCOILEUS, 34-43
HH. Animals large; antlers four to five feet. CERVUS, 31-34
CC. Toes terminating in claws.
D. A gap on each side of the jaws caused by the absence of canine teeth. Incisors two in each jaw, large and protruding, working against each other like a pair of chisels.
E. A pair of small rudimentary incisors behind the upper pair of large ones.
F. Tail short; hind legs much longer than the front ones; teeth, i 2/1, c 0/0, p 3/2, m 3/3..... LEPUS, 75-92
FF. No external tail; legs about equal; p 2/2.... OCHOTONA, 93
EE. No extra incisors.
F. Hair interspersed with sharp spine-like quills; teeth, i 1/1, c0/0, p 0/0, m4/4..... ERETHIZON, 94
FF. Without spines.
G. Form mole-like; fore feet modified for digging; no external ear; teeth, i 1/1, c 0/0, p 0/0, m 4/4.