3o8 ALUS. [Vol. XVIII. 



//■;-. Trigeminal foramen. 



/gr. Temporal groove. 



f/nt. Truncus maxillaris trigemini. 



to. Trigeminal opening of trigemino-facial chamber. 



tr. Nervus trochlearis. 



trfr. Foramen for trochlearis. 



Fi. First vertebra. 



V. Nervus vagus. 



v^v'^v^v'^. First to fourth vagus nerves. 



vfr. Vagus foramen. 



VO. Vomer. 



VR. Ventral rib. 



