364 Coe and Kunkel— California Limbless Lizard. 
the second superior labial (s.7) and the very small elongated inferior 
preocular, and dorsally with the frontonasal, the supraocular by a 
very short suture, and with the most anterior of the three small 
superciliaries. Posterior to the frontonasal is a single large hexago- 
nal scale, according to Cope (:00) probably the fused frontal and 
frontoparietals (f), provided with a notch on its posterior margin 
to accommodate the small interparietal. The inferior preocular is 
situated ventrally with respect to the superior preocular. It is very 
small, linear or subtriangular in form with its base directed dorsally ; 
it is in contact on the ventral side principally with the third superior 
labial and sometimes also by a very short suture with the second 
superior labial. Out of more than 30 specimens examined, four were 
found in which the inferior preocular was absent and in two cases it 
was present on the right side only. 
The first supraocular (text-fig. 10, so) is triangular and situated 
posteriorly to the frontonasal and laterally to the large fronto-fronto- 
parietal. It is in contact also with the second supraocular poste- 
riorly, also with the superior preocular by a very short suture, and 
the first and second superciliaries. The second supraocular is rather 
small and elongated; situated dorsally to it are the fronto-frontopari- 
etal and the outer one of the parietals ; yentral to it are the second 
and third superciliaries ; anterior to it are the first supraocular and 
second superciliary, and posterior to it are the parietal and one of 
the postoculars. 
The three superciliaries form a series dorsal to the eye: the middle 
one (sc) is lozenge-shaped and higher than broad and separates the 
first and third, which are subequal; the first superciliary is elongated 
with parallel sides and is in contact with the superior preocular ante- 
riorly and ventrally; the third is slightly lower than the first and is 
bounded dorsally by the second supraocular and by the superior post- 
ocular posteriorly. 
Two squamiform subequal postoculars lie side by side in transverse 
series ; the inferior one is in contact ventrally with the fourth supe- 
rior labial; the superior postocular is bounded anteriorly by the 
second supraocular and the third superciliary, and dorsally by the 
parietal. Posterior to these the regular squamation of the body 
proper begins. 
There are six superior labials which form a series bounding the 
mouth dorsally: of these the first is very low and situated ventral to 
the rostral and nasal plates; the second (s./) is the largest, about 
twice as long as high, subrectangular in shape and in contact with 
the internasoloreals and superior and inferior preoculars dorsally ; 
