NORTH AMERICAN BATRACHIA AND REPTILIA. 4:5 



xiphistenitil t'ontaiiellc rarely present; tongue 



squamose ; nositril in a plate Scinoldce. 



I/. Supranasal plates numerous; internasal plate large, 

 transverse; head shielded behind; tongue papillose, 

 sheatlied at the tip; clavicle with a simple proximal 



end; mesosternum cruciform Anguidce. 



z. Tongue simple, papillose; clavicle with a simple, 

 proxim^al end. 



Articular bone and xijihisternal fontanelle want- 

 ing; abdominal ribs present Anolidm. 



Articular bone and, generally, xiphisternal fon- 

 tanelle present ; abdominal ribs rarely present. 



Iguanidre. 

 B. Vertebrte usually amidiicodian; parietals double. 



Pterygoid not touching sphenoid; tongue papillose. 



GecGonidiM. 



Artificiat, Synopsis of Families. 



A. Limbs none. 



Tongue scaly; eyes invisible AwjphisbcEnidce. 



Tongue not scaly; eyes visible Anguidm. 



B. Limbs present. 

 X. Toes simple. 



1. Tongue deeply bifid at end ; scales of back small, 

 granular Teidm. 



2. Tongue not deeply bitid. 



Scales of back large, smooth Scincidce. 



Scales of back large, carinate Tguanidce. 



y. Toes expanded into disks near the end. 



Toes clawless; scales of back large, keeled. Gecconidce. 

 Toes with claws; scales of back granular. . .Anolid(e. 



Family AMPHISB.ENID.E. 



Genus Riiineura, Cope. 



Xasal shields present; ten or twelve plates on head; no pr&- 

 j.nal pores; tail depressed, and tuberculous above; eyes invisible. 



80. a. fioridana, Baird. Floridan Blind Snake. Yertical 

 ]date large and irregularly pentagonal; occipitals small; three 

 small plates on each side of vertical ; nasal single ; superior labials 

 four; inferior three or four; sternal plates small, about 12; three 

 pair of preanal plates in a longitudinal series ; superior maxillary 

 teeth r)-."), anterior pair longest; l-tto 16 rings on tail, all but 



