574 



DR. J. MUEIE ON THE ANATOMY OF THE SEA-LION. 



no. Antorbital. 



po. Postorbital. 



pf. Postfrontal. 



c. Condyle. 



pmd. Paramastoid. 



h. Hamular (of pterygoid). 



ap. Anterior palatine. 



to. Infraorbital. 



als. Alisphenoid. 



ov. Ovale. 



ca, ca*. Carotid (canal). 



jug. Jugular. 



mae. Meatus auditorius externus. 



mai. Meatus auditorius interims. 



sm. Stylo-mastoid. 



aur. Auricular. 



ac. Anterior condyloid. 



ex. Exoccipital. 



fm. Foramen magnum. 



v. Vascular (bony channels). 



Processes. 



cd. Mandibular condyle. 



co. Coronoid. 



a. Angle of mandible. 



t. Tentorium. 



gl. Glenoideum. 



eth. Ethmoidal spine. 



Foramina. 



vc. Vidian canal. 



pe. Posterior ethmoidal. 



2. Optic. 



la. Lacerum anterius. 



Im. Lacerum medius. 



sp. Spinosum. 



af. Aquaeductus Faliopii. 



av. Aquaeductus vestibuli. 



Ig. Longitudinal (sinus). 



mg. Meningeal groove. 



me. Mental. 



i. Incisive. 



id. Inferior dental. 



/, /. Incisors. 

 C, C. Canines. 



Teeth. 



PM,T3I. Premolars. 

 31, M. Molars. 



The upper dotted line in fig. 5 denotes where calvarium was sawn through. Com- 

 pare figs. 9 and 10. 



PLATE LXXVII. 



Fig. 11. Skeleton of the Zoological Society's male Sea-lion, sketched in the natural 

 attitude of walking, and with dorsum of the sacro-pelvic region slightly 

 turned towards the observer. 

 Series of skulls of Otaria jubata, illustrating progressive growth, reduced to scale 



one fourth their natural magnitudes : — 



Fig. 12. Profile of skull, No. 3971 c, College-of-Surgeons Museum. It is one of two 

 young Seals' crania presented by Captain B. J. Sullivan, R.N., in 1844, and 

 described by him in a letter as " about a fortnight old." 



Fig. 13. Upper view of the same specimen. 



