18S1.] 
MZARDS FROM KCUADOR. 
233 
form from all tlte allied ones witli which I have the means of cotn- 
jmring it. As in all other reapecta it is a Cereosaurat md would, on 
ncf'outit of its narrow eioiigate keeled dorsal scales, belong to the 
subgenus Pantodacfylua^ from which it must be separated in cotise- 
(juence of this [H-cuharity of the feet, I have formed a new subgenus 
FrivnodHcUjhm for ita recojition. 
Three ratber large specimens from Canelos, and one from Palla- 
tauga. 
6. LePOSDMA^ CARINICAUDATUM. 
Lepidosoma carinicttudatum^ Cope, J.Ac. Phil. viiL 18?6, p, 160. 
Two good-sized s|iecimeus of this very strikiDg Bpecies from Pal- 
la tanga and two from CaneSos. 
7. Leposoma BiTCKi.EYi, ftp. n. (Plate XXII. fig, 2.) 
Rostral plate and syniphysial plate of lower jaw broad, especially the 
latter, A single iuteriiiisal one third broader than long ; two trans- 
verse fronto-ufl«nls with their points in contact ; frontal moderate- 
sized, triangular in front, truncated behind, longer than broad \ two 
fronto.parltftals ; the interparietal and two parieiflls are tliree loiigish 
straight plates, nearly equal and nniform, evenly truncated behind 
at the limit of the occipital region, and without any intervening 
occipital plates. Tliese three plates have their edges raised, formhig 
longitudinal ridges on the binder portion of the head ; and the 
tendency to rugo?ity extends also to the fronto-parietals. Fonr 
supraorbitals. Two uarrow oblique frenale. Five supralabinls ; oue» 
extremely h>ng> beneath the anterior part of the eye. Four infra- 
lahials, A single mental, followed by three pairs of large plates, 
those of the first two pairs in contact, the third being separated by 
smaller irregular-shaped jdates, which go semicircularly round to- 
wards the angle of the rnouth. 
Temporal scales convex. Ear-opening large, rounded in front, 
truncate behhid. Sides of neck to shoulder also covered with round 
convex scales. The whole upper surface from the parietal plates, 
and the sides of the body between the fore and hind limbs as far as 
the abdomen, covered with elongate lanceolate keeled scales, the 
points projecting. From the regular plates of the postmental re- 
gion, uniform triangular pointed scales cover the whole of the space 
as far as the chest, where they form a very indistinct collar not con- 
tinued into any transverse fold on the side of the neck. Scales on 
the chest and anterior part of ventral surface also pointed hke those 
of the throat; middle and posterior abdominal scales square, iu eight 
longitudinal series. Two small anterior and two large posterior 
iireeanal scutes, some smaller ones at tile sides. Upper surface of 
imbs with keeled scales. Toes of fore limb very short, the iuner 
one minute, the third a little shorter than the fourth. Tad with 
strongly keeled scales above, like the back, the keels showing a 
' St?e Prof Pctcri'a rpcont rehabilitation of the t'ld Spixian form of (hii 
nam*-, ' M.B. Ak. Berl,' 1880, p. 217. 
