212 REPTILES. 



32. Leiol^mus, Weigmann. Proctotretus, Duin. et Bib. 



Head pyramidical, quadrangular, more or less depressed, with 

 moderate, smooth, not imbricate, many-sided shields, with a rather 

 distinct interparietal shield. Sides of neck with small, thick or 

 granular scales, a longitudinal ridge and a cross fold in front of the 

 shoulder. Nostril lateral, just on the face-ridge. Palate toothed. 

 Cheek with 1 (rarely 2) rows of scales. Infraorbital shield elon- 

 gate. Ear sunk. Eyebrows scaly, with 3 or 4 larger shields. 

 Body roundish. Scales imbricate, of the upper part keeled, of 

 the belly smooth. Back and tail not crested. Tail long, round- 

 ish. Toes simple. Femoral and preanal pores none. Males 

 with pores on the front edge of the cloaca. 



* Bodi/ without folds on the sides. Scales of the hinder part of the 

 thigh small, subequal, the loiuer ones rather larger. 



f Scales of the back elongate, rhombic, ivith a strong rather 



produced keel. 



The Blue-bellied Leiol^mus. Leiolsemus cyanogaster. 

 Proctotretus cyanogaster, Dum. et Bib. E. G. iv. 273. Bell, Zool. 

 Beagle, 12, t. 5,f 2, (tail reproduced). 



Green, with a yellow streak on each side of the back, beneath 

 blue ; ears large, simple in front ; scales of the sides of the neck 

 small, rhomboidal, imbricate, keeled, of the back and sides large, 

 lozenge-shaped, with a dagger-pointed keel ; of the throat and 

 belly entire ; the back of the thighs completely granular. 



a. Adult, in spirits. Bronzed, black-spotted, tail with a central 



dark streak above. Chili. Presented by C. Danvin, Esq. 



b. In spirits. Olive, with a broad pale streak on each side. Val- 



divia. Presented by C. Darwin, Esq. 



Bell's Leiol^mus. Leiolaemus Bellii. 



Dark olive, yellow- varied ; head black, yellow-dotted ; beneath 

 greyish ; head-shields rather convex ; ears with small blunt scales 

 in front ; scales rather large, yellow-edged, with a central, strong, 

 rather produced keel, concave on the sides; of the sides of the 

 neck rather large, thick, narrow, keeled ; of the temples convex, 

 bluntly keeled; of the tail rhombic, truncated. 



a. Adult, in spirits. Tail reproduced. Chili. From Mr. Cu- 

 ming's collection. 



Bibron's Leiol^mus. Leioljemus Bibronii. Proctotretus 

 Bibronii, Bell, Zool. Beagle, Rept. 6, t. '3,f 1. 



Olive, with series of black spots ; the tail with a central black 

 streak above ; scales of the head smooth, rather convex ; of tem- 

 ple and neck rounded, smooth, imbricate ; of the neck very small; 

 of the back rhomboidal, keeled, acuminated behind ; of abdomen 

 entire ; ears oval, front one toothed ; cheek-scales in 1 series ; the 

 hinder face of the thigh entirely granular. 



