NATURAL SCIENCES OF PHILADELPHIA. 199 



shields smooth, not imbricated. Auricular aperture moderate, simple. Sides 

 of the neck ridged or rumpled, granular; a vertico-oblique fold in advance of 

 the shoulder. Dorsal scales small, slightly carinated, posteriorly obtuse ; lateral 

 scales a good deal smaller, subgranular. Abdominal scales rhomboid or sub- 

 lanceolated, entire or subfimbriated posteriorly. Thighs either wholly granu- 

 lar or with a patch of scales near the tail. Coloration : Dark spotted upon a 

 light ground, and occasionally speckled also. 



Observation. — Proclotretus niaculatus, Dum. & Bibr. ; and P. wiegmannii, Bell, 

 {O.Jitzroii, Grd.) belong to this genus, together with the following one. 



17. OrtholyEMUS beaglii. — Proclotretus muUimaculatus, Bkll, Zool. Voy. 

 Beagle, v, 1843, 17, pi. ix, fig. 1. — Head short, depressed, wedge shaped. Snout 

 rounded. Three series of supralabials, smaller than the labials. Lower labials 

 larger than the upper labials ; three series of infralabials. Seven or eight pairs 

 of mental shields. Temporal scales small and subconvex. Auricular aperture 

 moderate. Dorsal scales smaller than the abdominal ones, which are subrhom- 

 boid, rather acuminated and subfimbriated. Upper part of flanks subgranular. 

 Posterior aspect of thighs granular with a patch of scales near the tail. Olive 

 brown above, maculated with black; a jet black humeral spot; beneath whitish 

 yellow, unicolor. 



18. AiiPHiBOLURUS maculiperus. — A diminutive scaly ridge along the middle 

 line of the back. Sides of the hind part of the head spineless. Scales of the 

 throat, abdomen and inferior surface of the limbs obsoletely carinated, those of 

 the throat not hanging down, sides of the body with some short and erect 

 scales. Tail without cross rows of spines above. Yellowish, with transverse 

 blackish bands on the back, limbs and tail; belly and tail beneath unicolor, 

 throat and limbs dark speckled. 



Locality. — New South Wales, Australia. 



OREODEIRA (nov. gen.). — Head depressed, rather broad and short, covered 

 with small subtuberculous and subimbricated plates. Occipital plate rather 

 large. Nostrils lateral, situated within the extension of the supraciliary ridge 

 along the snout. Supralabial plates and temporal scales carinated. Tongue 

 fleshy, anteriorly notched or bifid. Compressed and cutting teeth on the sides 

 of the jaws and subconical incisors anteriorly. Auricular aperture moderate, 

 subserrated ; tympanum situated near its surface. A gular and a pectoral 

 cross fold; sides of the neck variously folded or rumpled. Nape with a small 

 crest vanishing away along the back. Scales on the back moderate, homogene- 

 ous, keeled, disposed upon oblique series; on the abdomen, small, subequal and 

 keeled also ; on the occiput and neck very small, subgranular. Limbs slender and 

 elongated, terminated by five fingers and five toes, slender, compressed, unequal, 

 clawed. Tail slender, subconical, and tapering. Femoral and preanal pores 

 wanting. 



Observation. — This genus belongs to the group of Phrynocephali, and as far 

 as we know, is the only one found in Australia. 



19. Okeodeira gracilipes. — Three complete series of supralabials, smaller 

 than the labials ; infralabials constituting likewise three series. Mental shields 

 quite small, scarcely distinguishable from the infralabials. Posterior aspect of 

 thighs, scaly. Caudal scales conspicuously larger than the dorsal and abdo- 

 minal ones. Brownish olive above, anteriorl}' maculated; beneath yellowish- 

 olive ; chin obsoletely spotted. 



Locality. — New South Wales, Australia. 



1857.1 15 



