AMPHIBIANS AND REPTILES. 189 
and upper edge of profile as seen from above with tip of snout 
rather broadly rounded. Eye a little elongate, high, about first 
*/, in length of mouth. Mouth with:a long undulated gape, or 
slightly double-convex as seen laterally. Rostral plate truncate 
above, not extending on upper face of muzzle, lateral borders and 
its lower surface concave. Upper labials 9, and third, fourth, 
fifth, sixth and seventh subequally larger. Second upper labial 
bounding front margin of pit, twice as high as long, and reach- 
ing loreal and middle preocular above. Third upper labial trape- 
zoidal. Lower labials 10, first largest, and last smallest, others 
subequal more or less. Upper prefrontal larger than middle pre- 
ocular, which bounds posterior margin of pit. Lower preocular 
small, with another similar small scale directly in front over upper 
front margin of third supralabial and forming lower posterior 
boundary of pit. First infraocular largest of rest of series, includ- 
ing postoculars, all of which are subequally small. Supraocular 
large, extending both anterior and posterior to frontal, and its 
width about 1% in its length. Prefrontal in contact in front and 
much larger than internasal, which is rather elongate. Nasals 
rather large, and nostril piercing most of commisure. Frontal 
consisting of 5 elements, 4 of which are largely marginal. Parie- 
tal plates a little smaller than prefrontals. Loreal plate, small, 
trapezoidal. Symphyseal plate nearly equilaterally triangular. 
Pregenials well developed, large, and postgenials in 3 or 4 series, 
narrow and much shorter. Rest of upper surface of head covered 
with small convex scales. Scales on back all strongly keeled, and 
lateral series in contact with gastrosteges, more or less smooth, 
though each with a slight median ridge or keel on posterior portion 
of body. Scales in 23 transverse series over back. About 200 
scales counted from occipital plates to tip of tail. Gastrosteges 
about 127 to vent. Urosteges single, about 39-+8-++1 in number 
to tip of tail. Tail short, robustly rounded, tapering to tip, and 
about 51% in body. Color in alcohol pale mauve generally over 
back and upper surface of body. Upper surface of head very 
pale or light yellowish-brown, uniform, and extending also down 
over sides and entire under surface of head. Entire surface of 
body when examined closely found to be finely and obscurely 
specked or dotted with minute points of same shade as ground 
