140 BULLETIN OF THK ESSEX IN8TITUTK. 



r. liostrum. 



r I. Foramen for ramus lateralis facialis of the seventh nerve. 



/• m. Foramen for ramus maxillaris of fifth nerve. 



r n. Foramen for ramus mandibularis of fifth nerve. 



r p. Foramen for ramus ophthalmicus profundus of fifth nerve, 



r p i. Foramen for ramus palatinns inferior. 



r p a. Foramen for ramus palatinus superior. 



/• H. Foramen for ramus ophthalmicus superficialis of fifth. 



s. Stapes. 



s h. Supraorbital band. 



sp. Stapedial process. 



s t. Synotic tectum. 



s u. Support of balancer. 



t. Trabecula. 



t a. Tympanic annul us. 



* c. TegMien cranii. 



t e. Tectal cartilage. 



t, m. Taenia tecti medialis. 



tr c. Trabecular crest. 



V. Foramen for branch of fifth nerve. 



vii. Foramen for branch of seventh nerve. 



viii. Foramen for branch of eighth nerve. 



V 2). Ventral nasal process. 



r. Ventral trabecular rod. 



EXPLANATION OF PLATP^. 



Fig. 1. Side view of model from Amblyntoma punctata, ten ram. 

 long. 



Fig. 2. Dorsal view of same. 



Fig. 3. Dorsal view of modeMromAmblystotna punctata, eleven mm. 

 long. 



Fig. 4. Side view of model from Amblystoma punctata, twelve mm. 

 long. 



Fig. 5. Dorsal view of same. 



Fig. (J. Ventral view of same. 



Fig. 7. Dorso-median view of otic capsule of same. 



Fig. S. Side view of model from Amhlystoina je.ffersoniaaa, thirty- 

 nine mm. long. 



Fiii. y. Dorsal view of same. 



