326 



CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Se«. 



h' ptesiicjoid 



Thirc^t 



_jndnclihh 



_[i._hjJOQ/ossus 



_f2rccessus 

 ' entoo/ossus 



^r^tk 



orn 



L&pjt. horn 



proce^susS 



retro h^S<3 /is 



Vsc/^J 



Fig. 7 



