Coe and Kunkel— California Limbless Lizard. 365 
the third is higher than broad and is bounded dorsally by the inferior 
eyelid, the anterior preocular and the fourth superior labial; the fourth 
is subrectangular, smaller but somewhat higher than the second and 
reaches the inferior eyelid ; it is in contact also with the postocular 
dorsally and posteriorly. The fifth and sixth are somewhat smaller 
than the others; they are both squamiform and scarcely to be dis- 
tinguished from the regular scales on the body in the same region. 
Lying in the notch of the fronto-frontoparietal is the rhomboidal 
interparietal (text-fig. 10, 7p), which bears somewhat anterior to its 
centre the browspot, a pigmentless area of circular shape and indis- 
tinct outlines, whose diameter is equal to about one fourth the great- 
est width of the scale. It is bounded posteriorly by the occipital 
plate in the median line and the parietals. The occipital is rhomboi- 
dal in shape and smaller than the interparietal and parietals. Two 
subequal, rhomboidal parietals (pa) are arranged on each side in a 
transverse row posterior to the fronto-frontoparietal and the inter- 
parietal. Several rows of scales posterior to these are slightly larger 
than the body scales. 
On the lower jaw is a large symphysial plate (text-fig. 11, s) sub- 
hexagonal and equilateral. It is flanked by the first inferior labial 
(tn), which is trapezoidal in form. Six inferior labials of gradually 
diminishing height form a series bounding the lower jaw medially. 
The second inferior labial is rhomboidal and of about the same size 
as the first. The fifth and sixth are considerably smaller than the 
others. Situated medially with respect to the inferior labials is a 
series of four infralabials. The first infralabials (¢/) are large and 
trapezoidal in form. They meet in the middle line and are bounded 
laterally by the first and second inferior labials; the second and third 
infralabials are oblong, about twice as long as broad ; the third is 
somewhat smaller; and the fourth considerably smaller than the 
third. There is a second series of infralabials situated medially with 
respect to the first. The first scale of this series is broad and meets 
its fellow in the middle line by a long suture ; the second is some- 
what smaller and trapezoidal. Two squamiform scales somewhat 
larger than the regular scales of the body are situated posterior to 
the first infralabials of the second series medially. Posterior to these 
the regular squamation of the body begins. 
The scales of the body in the region of the neck are considerably 
narrower in an antero-posterior direction than those of the body 
proper. ‘There are also several more longitudinal rows in this region 
to allow for the slightly larger diameter of the base of the head. 
The scales of the body (text-fig. 13) are very regular in size and 
Trans. Conn. Acap., Vou. XII. 24 DreceMBeR, 1906 
