344 TELUIDR. 
teeth compressed longitudinally, bi- or tricuspid. Head with large 
regular shields ; anterior nasal in contact with its fellow; nostril 
in the suture between the two nasals or anterior to that suture. 
Eyelids developed. Ear exposed. Limbs well developed, each with 
five digits. Dorsal scales small; ventral plates large, subquad- 
rangular, smooth, forming regular series. A double collar-fold. 
Femoral pores. Tail cyclotetragonal. 
Tropical America. 
Synopsis of the Species. 
I. Six longitudinal rows of ventral plates; head-shields small, 
numerous. 
Head-shields strongly keeled; mesopty- 
chium* with scarcely enlarged scales. 1. bridgesii, p. 345. 
Head-shields not keeled; a row of en- 
larged shields on the mesoptychium.. 2. septemlineata, p. 346. 
Il. Eight rows of ventral plates ; caudal scales straight, keeled. 
Outer row of ventrals considerably smaller 
than: ther Others: on ccsne sae s i odelaoes 3. festiva, p. 347. 
Outer row of ventrals as large as the 
others; one row of large brachial 
SIGS cic don sese ees w cena tas 4. undulata, p. 347. 
Several rows of brachials; male with a 
group of spines on each side of the 
preanal region 2.0.44 se eee es 5. edracantha, p. 349. 
III. Hight or ten rows of ventral plates; caudal scales oblique, 
smooth or feebly keeled above, smooth on the sides of the tail. 
Upper caudal scales perfectly smooth .. 6. lineolata, p. 349. — 
Upper caudal scales keeled; eight rows 
Of Ventrals o.aseresgegt da sana see 7. teniura, p. 350. — 
Upper caudal scales keeled; ten rows of 
VOnbrals: 5 ison gee gene wate Pees 8. polops, p. 350. 
IV. Ten or twelve rows of ventral plates; caudal scales straight, 
keeled; femoral pores less than 30 on each side. 
A. A broad band of enlarged gular scales across the throat. 
Second and third supraoculars separated 
from the frontal by granules........ 9. bifrontata, p. 351. 
Outer toe, laid forwards, not extending 
as far aS dO? ..c4ceswiwewwuwans 10. surinamensis, p. 352. 
Outer toe extending as far asinner .... 11. pleti, p. 354. 
B. A small central group of enlarged gulars. 
Four supraceulars 2... ..568¢e06 20a 12. ritsti, p. 854. 
Three supraoculars =... veee 4. 183, vittipunctata, p. 355. — 
* The space between the two collar-folds. 
