360 ' TEIID^. 



Guianas ; Trinidad ; St. Eustatius. 



a, cJ. Demerara. Col. Sabine [P.]. (Type.) 



j' o , ? (Type of A. undulata.) 



6. CNEMIDOPHORUS*. 



Ameira, part., Fitzing. N. Class. Rept. p. 21. 



Cnemidophorus, part., Wac/ler, Syst. Ampk. p. 154 ; Wiegm. Herp. 



Mex. p. 9. 

 Cnemidophorus, Dvm. ^ Biht'. v. p. 123 ; Gray, Cat. p. 20; Bocourt, 



Miss. ^c. Mex., Bept. p. 2G8. 

 Verticaria, Cope, Proc. Avier. Philos. Soc. xi. 1869, p. 158. 



Tongue long, narrow, bilobate and not retractile at the base. 

 Lateral teeth compressed longitudinally, bi- or tricuspid. Head 

 ■with large regular shields ; anterior nasal in contact with its fellows ; 

 nostril in the suture between the two nasals, or anterior to that 

 suture. Eyelids developed. Ear exposed. Limbs well developed, 

 pcntadactyle. Dorsal scales small ; ventral plates large, subquad- 

 rangular, smooth, forming regular series. A double collar-fold. 

 Femoral pores. Tail cyclo-tetragonal. 



America. 



SynojJsis of the Species. 



I. Dorsal scales equal. 



A. Nostril between the two nasals ; males with a spine on each 

 side of the prseanal region. 



1. 10 or 12 longitudinal rows of ventral plates. 

 Brachial shields small 1. murinus, p. 361. 



2. 8 longitudinal rows of ventral plates. 



An anterior row of large brachials ; ante- 

 brachials, outer row largest and con- 

 tinuous to the hand 2. espeuti, p. 362. 



An anterior row of large brachials ; ante- 

 brachials, inner row largest and con- 

 tinuous to the hand 3. lemniscatus, p. 363. 



Brachials small, in two rows ; mesopty- 

 chial scales hardly larger than those 

 of the chin 4. nigricolor, p. 364. 



B. Nostril anterior to nasal suture. 



1. 8 longitudinal rows of ventral plates. 



a. More than 12 femoral pores on each side. 



* Gicmidophorus perplextis, Baird & Gir. Proc. Ac. Philad. 1852, p. 128. — 

 South-western United States. 



C. inornaius, Hallow, eod. loc. 1858, p. 255.— N. Leon. 



C. decemlineatvd, Hallow, eod. loc. 1860, p. 482.— Nicaragua. 



