530 PRIMARY GROUPS OF MAMMALS. 
Contains twenty-nine magic ul Se two sub-orders; ARTIO- 
DACTYLI, With nineteen families ich eight are extinct, and PERISSO- 
DACTYLI With ten families, of wettest seven are extinct. 
IV. ORDER TOXODONTIA. 
Incisors (£ or 4, variable as to insertion), with incisorial crowns. 
Feet? carpal bones? hind foot with the astragalus at its anterior portion 
piney obliquely eres articulating in front only with the navicular; 
(calcaneum with an extensive upwards surface for the articulation of t 
fibula, a with a large niera process DEEDAR in front with the as- 
tragalus. Molars of upper jaw, broad and extending into an externo- 
anterior angle; of lower jaw, narrow and acs. in a uniform row). 
Contains two families, both of which are extinct 
V. ORDER HYRACOIDEA. 
Incisors G) of upper jaw next to symphysis (with persistent pulps) 
long and curved; those of lower jaw straight and normal. Feet with 
(and articulating with magnum), and affording an enlarged surface of at- 
tachment forwards for the "Wigs (which is antrorsely twisted) ; unciform 
and lunar separated by the interposition of the cuneiform and magnum 
ular; toes (four to the front feet, three to the hind) with terminal pha- 
langes encased in hoofs (inner nail of hind foot curved). Placenta 
"aaa nary 
tains one hin, 
VI. ORDER PROBOSCIDEA. 
neisors (3, or, in extinct forms, $ or 2, renewed from persistent 
pulps,) developed as long. tusks auriei outwards. Feet with palmar and 
plantar surfaces invested in extended pad-like integuments, which also 
underlie the toes: carpal bones in two regular (not inte Hocking) rows, 
broad and short; cuneiform extended inwards —broad, and furnishing an 
enlarged surface of attachment forwards for the ulna (which $ e e 
ed). Unciform dire in front of cuneiform, um 
uced eiform, and mag 
directly in front of lunar: hind foot with the astragalus at its anterior 
portion very short (convex,) and not deflected inwards, articulating in 
onary. nout 
produced into a very long proboscis. Legs mostly exserted outside the 
abdominal integument; and with the proximal and succeeding joints ex- 
tensible in the same line. 
Contains two families, one of which is extinct. 
(EDUCABILIA MUTILA TA.) 
. (Mutilate Series.y 
Posterior members and pelvis more or less completely atrophied; the 
