46. uma.—47. HOLBROOKIA. 207 
body above equal, much smaller than ventral ones. Interorbital 
space with two series of plates. Claws very long, slender and 
straight. Sides with a round black spot. Tail?” 
According to Cope, “ this genus is distinguished from Callisaurus 
by the presence of a series of spines, movable on their bases, on 
the outer margin of the foot.” 
Arizona. 
1. Uma notata. 
Uma notata, Bazrd, 1. 
“Head about two fifths the head and body. Above light pea- 
green, spotted with darker green. Beneath white. Head and body 
about two inches long.” 
Mohave Desert. 
47, HOLBROOKIA. 
Holbrookia, Girard, Proc, Am. Assoc, Adv, Se, iv. 1851, p. 201, and 
in Stansbury’s Exped, Gir. Salt Lake, p. 341; A. Dum. Arch. Mus. 
viii. p. 545 ; Bocourt, Miss, Sc. Mex., Rept. p. 160. 
Cophosaurus, Troschel, Arch. f. Nat. 1850*, p. 389. 
Tympanum concealed. Body depressed ; no dorsal crest; dorsal 
scales small, uniform. Upper head-scales small, occipital large. 
Two strong transverse gular folds, the posterior with denticulated 
edge; no gular pouch. Digits with sharply keeled lamelle in- 
feriorly. A long series of femoral pores. ‘Tail rather short, sub- 
cylindrical. Lateral teeth subconical; no pterygoid teeth. A 
large sternal fontanelle. No abdominal ribs. 
Southern North America. 
Synopsis of the Species. 
J. The adpressed hind limb reaches the tip of the snout; foot 
nearly as long as the distance between the axil and the groin. 
Tail much flattened, with black spots in- 
fEPIOLY 2:90 te ROT ROS PEERS ey wea es 1. tevana, p. 208. 
Tail roundish, immaculate inferiorly ; tibia 
not longer than the distance between the 
end of the snout and the antepectoral fold; 
a pair of black spots on each side of the 
Belly veer es ete edd Bae ewee cee ene 2. propingua, p. 208. 
Tail roundish, immaculate inferiorly ; tibia 
longer than the distance between the end 
of the snout and the antepectoral fold; no 
spots on the sides of the belly .......... 3. elegans, p. 209, 
II. The adpressed hind limb does not reach the eye; foot measuring 
one half to two thirds the distance between the axil and the 
groin. 
* Issued 1852, 
