CLASS REPTILIA. 



Northern Tropidolepis. Tropidolepis Undulatus, Gray. 

 Agama Und., Daud. Lacerta Hyacent/iina, and Lac. 

 Faciata^ Green. 



Ash, with irregular brown cross-bands ; head with regular 

 flat plates. North America. Mus. Brit. 



Thorny Tropidolepis. Tropidolepis Aculeatus, Gray. 



Head with convex irregular scales : eyebrow plates band- 

 like, back with a crest of short compressed scales ; scales of 

 body and limbs dagger pointed. Martinique. 



Cuvier places Agama Nigricollis, and A. Cyclurus, Spix, 

 in this genus ; but Spix says they have no femoral pores, 

 they are more like Ophyessa. 



Collared Tropidolepis. Trop. Torquatus, Gray. Scelopho- 

 rus, Weigmann. Iris xxi. Tecoixin Hernandez. 



Olive brown, with a black collar, in an orange band ; dorsal 

 scales large, keeled ; rhombic, smooth, tip denticulated. 

 Mexico. Mus. Brit. 



Spinous Tropidolepis. Trop. Spinosus, Gray. Scelophorus, 



Weigmann. 

 Grey brown, back with a series of brown spots ; scales rhom- 

 bic, tooth-edged ; apex longly pointed, acute ; abdominal ones, 

 smooth truncate. Mexico. 



Side Streaked Tropidolepis. Trop. Pleurostictus, Gray. 

 Scelophorus, Wiegmann. 



Olive grey ; sides black and yellow spotted ; scales rhom- 

 bic, keeled, tooth-edged, mucronate ; those in base of tail 

 largest. Mexico. 



Green Tropidolepis. Trop. Grammicus. Gray. Scelerop- 

 horus. Weigmann. 



Shining coppery olive, with black flexuous cross lines; 



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