400 Coe and Kunkel— California Limbless Lizard. 
sp splenial. v.ec ventral cloacal chamber. 
sq squamosal. v.d vas deferens. 
st stapes. vo yomer. 
t testis. vr vertebra. 
t.p terminal pit of phallus. v.t velum transversum. 
w ureter. W.d Wolffian duct. 
u’ diverticulum of ureter. II optic nerve. 
ut uterus. V trigeminal nerve. 
v vacuolated tissue. VII facial nerve. 
PLATE XLI. 
Figs. 1-3. Brain of adult; dorsal, lateral, and ventral aspects respectively. 
The blood vessel (6.v) extending in the groove between the cere- 
bral hemispheres (c¢.h) is shown in a very distended condition 
with its branches ramifying over the union of the olfactory lobes 
(olf) and cerebral hemispheres just beneath the pineal eye. The 
optic chiasma and the scalloped anterior edge of the infundibulum 
(in) are shown in fig. 3. The cranial nerves with the exception 
of the first, second (II), fifth (V), and seventh ( VII) are not 
shown. x7. 
Figs. 4-6. Skull of adult from dorsal, ventral, and lateral aspects respectively. 
~ 
Wigs ai. 
Fig. 8. 
iris, 38): 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
In fig. 4, internal to the ectopterygoid are seen the two minute 
bones, the postfrontal and postorbital. x 7. 
Left mandible seen from the right side. x 7. 
Dentary bone of right mandible seen from the left side, showing the 
shallow grooves on the recurved teeth. x 15. 
PLATE XLII. 
Dorsal view of anterior end of 70™™ embryo, showing the large 
interparietal plate with the pineal eye. x8. 
Interparietal plate and pineal eye of adult. x 20. 
Interparietal plate of embryo 60™™ long. x 20. 
Hyoid apparatus. x8. 
Rib from left side, posterior aspect. x17. 
Left pelvic bone from dorsal side. x 17. 
Figs. 15-18. Dermal ossifications from scales of cervical region. x 17. 
Fig. 19. 
Fig. 20. 
Fig. 21. 
Fig. 22. 
Thoracic vertebra seen obliquely from above and right side, showing 
the transverse processes at the anterior end of the centrum. x 17, 
Same vertebra seen from dorsal side. x 17. 
Second cervical vertebra from anterior end. x17. 
Same vertebra from right side. x 17. 
Figs.23, 24. Anterior and posterior segments respectively of one of the caudal 
vertebre seen from the side, showing the ‘‘ breaking joint.” 
ocalidie 
