252 8 A U R I A. 



in orbitam producto. Apertura auditoria parva, antice siibdenticu- 

 lata. Scutellis praeanalibus subaequalibus. Galore fusco-olivaceo, 

 cum vitta paUida nigro maryinata ad partem lateris superiorem. 

 Dorso et lateribus dlbo nigroque punctatis ; abdomine unicolori ; gula 

 mentoque nigro punctatis. 



SPEC. CHAR. Body rather long, protected by thirty-six longitudinal 

 series of scales. Snout elongated. Fifth upper labial entering into 

 the orbit. Auricular aperture small, slightly denticulated in front. 

 Preanal scales subequal. Olivaceous-brown, with a pale streak, mar- 

 gined with black, situated along the upper portion of the flanks. 

 Dorsal region and sides somewhat speckled with black and white. 

 Abdomen unicolor. Throat and chin speckled with black. 



SYN. Lygosomclla aestuosa, GRD. in Proc. Acad. Nat. Sci. Philad. November, 1857. 



DESCR. The body is comparatively elongated, subcylindrical, much 

 broader than deep; the tail being but a little longer than the body and 

 head combined, subcylindrical, somewhat depressed at the base, stout- 

 ish, and tapering posteriorly. The head is well developed, depressed, 

 elongated, subquadrangularly conical. The limbs are small ; the ante- 

 rior ones will reach the orbit when brought forwards, and when bent 

 backwards they will extend a little beyond the third of the distance 

 to the groins. In bringing forwards the posterior pair, the extremities 

 of the toes will extend midway to the axillae, so that neither the 

 fingers nor the toes would meet on the sides of the body if directed 

 towards one another. The fingers and toes themselves are of mode- 

 rate length, unequal. 



The nasal plates approximate one another without coming into con- 

 tact. The prefrontal is lozenge-shaped, as long as broad ; the post- 

 frontals being small, and more widely apart than the nasals. The 

 vertex plate is elongated, broad, anteriorly angular, tapering and 

 spear-shaped posteriorly, where it overlaps slightly the parietals, as in 

 0. zelandicum. The parietals themselves are subrhomboid, broad 

 behind, contiguous anteriorly to the second, and sideways to the third 

 and fourth supraoculars. The symphyseal, which is larger than the 

 rostral, is hemidiscoid in shape, the lower labials being seven in num- 

 ber. The transparent disk of the lower eyelid is elliptical and central. 

 The auricular aperture is small, and the tympanum rather sunk, some- 



