] '6S IGUANIDiE. 



24. LIOL^MUS*. 



Liolsemus, Wiegm. Nova Acta Ac. Leop.-Carol. xvii. i. 1835, p. 227, 



and Ilerp. Mex. p. 18 ; Gravcnh. Nova Acta Ac. Leop.-C'arol. xviii. 



1838, p. 717 ; Fitzing. Sgst. Mept. p. 73 ; Gray, Cat. Liz. p. 212; 



Girard, U.S. JExplor. Exped., Hop. p. 334. 

 Proctotretiis, part., Dum. c^ Bibr. iv. p. 266. 

 Ptycliodeira, Fitzing. I. c. p. 74; Girard, I. c. p. 340. 

 Liodeira, Fitzing. I. c. p. 74 ; Gray, I. c. p. 210 ; Girard, I. c. p. 339. 

 Saiuidis, Tschudi, Faun. Per., Hejit. p. 33. 

 Proctotretiis, Gray, I. c. p. 216. 

 Clirj'sosaurus, Gay, Hist. Chile, JRept. p. 24. 

 Rhytidodeira, Girard, Proc. Ac. Philad. 1857, p. 198, and U.S. 



Explor. Exped., Herp. p. 349. 

 Eulajinus, Girard, II. cc. pp. 198, 357. 

 Ortliolaemus, Girard, 11. cc. pp. 198, 368. 



Tympanum distinct. Body depressed ; no dorsal crest. Dorsal 

 scales more or less imbricate, keeled. Upper liead-scales small or 

 rather large. No fold across the throat ; no gular appendage. 

 Digits subcylindrical, with keeled lamellas interiorly. No femoral 

 pores. Male with anal pores. Tail conical or slightly depressed. 

 Lateral teeth tricuspid ; pterygoid teeth. Sternal fontanelle present 

 or absent f. No abdominal ribs. 



America south of the Equator. 



Synojjsis of the Species. 



I. Sides of the neck without any folds, covered with scales similar 



in every respect to those of the upper surface. 



28 or 30 scales round the middle of 

 the body : nostril sublateral, well 

 visible from above 1. nitichis, p. 140. 



30 or 32 (or less) scales round the 

 midddle of the body : nostril per- 

 fectly lateral 2. cJiilensis, p. 141. 



40 scales round the middle of the 



body 3. (jravenhorstii, p. 142. 



II. Sides of neck more or less distinctly folded, covered with scales 



smaller than those of the upper surface. 



A. Scales on the middle of the back larger than those on the sides 

 of the belly ; scales of the sides of the neck rhomboidal, im- 

 bricate, keeled. 



* Liolcsmus elegans, Tschudi, Faun. Per., Eept. p. 33. — Chancay, Peru. 



L. {Savridis) modestits, id. 1. c. p. 34. — Miraflores, Peru. 



Ckrysoscmrus morio, Gay, Hist. Chile, Rept. p. 47. — Valdivia. 

 t Absent in L. U'i€q7nanni and L. m%dtimaculatus. 



