134 ANTERIOR CRANIAL NERVES OF PIPA AMERICANA. 



mas. = masseter. 



n. =nasalis. 



o.c.m. = ociüo-motor. 



Ol. =olfactory. 



op. = optic. 



r.a.a. = ramulus acusticus anterior. 



r.a.l. = " " exterior. 



r.a.p. = " " posterior. 



r.a.bas. = " '* basilaris. 



r.a.neg. = *' *' neglectus. 



T.a.sac. = ** ** sacculi. 



s. s. = supramaxillaris superior. 



troct. = trochlearis. 



V, VII, VIII = origin of V, VII, and VIII from brain. 



Fig. 1. Nervous System of Pipa from the riglit side. 

 Fig. 2, Same from above. On the left side some of the more dor- 

 sal nerves are removed. 



