27. sCOLECOSAURUS.—28, COPHTAS. 417 
2. Scolecosaurus pallidiceps. 
Brachypus pallidiceps, Cope, Proc. Ac. Philad, 1862, p. 856. 
Fingers four, toes three. Scales in thirty-four series from axilla 
to groin, and twenty-three longitudinal. Frontonasal longer than 
broad, hexagonal ; five temporals ; two supracculars; frontal much 
longer than broad. Otherwise like S. cwuiert. General colour 
plumbeous, the scales margined with black ; head cinereous; a light 
brown band extends along each side of the back, separated from its 
fellow by four rows of scales. Total length 153 millim. 
Truando, Colombia. 
28. COPHIAS*. 
Chalcides (non Laur.), Bonnat. Encycl. Méth., Erp. p. 67; Daud. 
Rept. iv. p. 367 ; Wiegm. Herp. Mex. p. 12. 
Chalcis (non Fabr.), Merrem, Tent. Syst. Amph. p.75; Gray, Cat CTiz. 
. 57. 
Colobus (non Iilig.), Mer. 1. ¢. 
Cophias, Fitzing. N. Class. Rept. p. 20; Wieym. 1. ¢. 
Chalcis, part., Wagler, Syst. Amph. p. 196. 
Chalcides, part., Dum. § Bibr. v. p. 450. 
Microdactylus (Tschudi), Gray, l. ¢. 
Bachia, Gray, 1. ¢. p. 58. 
Herpetochalcis, Boettger, Ber. Offend, Ver. Naturk. 1883, p. 150. 
Tongue moderately elongate, arrow-headed. Teeth conical. Head 
with large regular shields ; frontonasal separating the nasals ; pri- 
frontals and frontoparietals absent; nostril pierced in the suture 
between the nasal and first labial. Eyes minute, eyelids developed. 
No ear-opening. Body and tail elongate, vermiform ; limbs rudi- 
mentary, the anterior with clawless, tubercle-like digits, the poste- 
rior similar to the anterior or styliform, undivided. Scales smooth, 
forming regular annuli, and also longitudinal series on the belly ; 
the dorsals narrow, either quadrangular and juxtaposed, or hex- 
agonal and overlapping; the ventrals broader, quadrangular, jux- 
taposed. No collar fold. Males with preanal pores. 
South America. 
Synopsis of the Species. 
I. Dorsal scales quadrangular, juxtaposed. 
Hind limb tridactyle ; an interparietal ; three 
supracculars.. 6.6... cee cece eee eee 1. tridactylus, p.418. 
Hind limb didactyle ; an interparietal ; two 
SUpLAOCUlaTS 6 o.4 ces wees ee 2. heteropus, p. 418. 
Hind limb undivided, styliform ; no inter- 
parietal: vaca yeseee eden Misys 3. flavescens, p. 418. 
II. Dorsal scales hexagonal, overlapping. 
Hind limb styliform, undivided .......... 4, dorbignyi, p. 419. 
* Chalcides heteropus, Licht. & Mart. Nomencl. Rept. Mus. Berol. p. 17.-- 
Venezuela. 
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