On the morphology of the duck and the auk tribes . l rib. •? ttj. Tympanic cavity. ne. Notochord. Supra-scapula. Ccntralo-ulmire. Nasal floor. St. Sternum. Cervical vertebra;. Nasal process of pre-maxi1- ,. Sternal keel. d. Dentary. lary. Sacral vertebra. Distal carpal. Obturator fenestra. tb. Tibial. , Digit. Occipital condyle. Tendon-canal. Distal tarsal. Odontoidprocess. te. Tibiale. Dorsal rib. op. Opisthotic. Tympanic wing of occipital Dorso-sacral vertebra:, Orbitospbenoid. ts. Tarsal. Dor
On the morphology of the duck and the auk tribes . l rib. •? ttj. Tympanic cavity. ne. Notochord. Supra-scapula. Ccntralo-ulmire. Nasal floor. St. Sternum. Cervical vertebra;. Nasal process of pre-maxi1- ,. Sternal keel. d. Dentary. lary. Sacral vertebra. Distal carpal. Obturator fenestra. tb. Tibial. , Digit. Occipital condyle. Tendon-canal. Distal tarsal. Odontoidprocess. te. Tibiale. Dorsal rib. op. Opisthotic. Tympanic wing of occipital Dorso-sacral vertebra:, Orbitospbenoid. ts. Tarsal. Dorsal vertebra. p- Parietal. 71. Ulna. , jili. Ectoethnioid. pa. Palatine. ne Ulnare. External nostril. Posterior angular process. Uro-sacral vertebra:. CO. Exoccipital. Parasphenoid. v. Vomer. En. Eustachian opening. Pb. Pubis. Vertebral artery. f. Frontal and femur. Posterior clinoid process. Vestibule. ft. Fibula. pep. Postcoracoid process of ster-num. RL. IRISH ACAD. CUNNINGHAM MEMOIR-. VI .Plate W !v F ? -,-,- ainat KP Parker kth PLATE V, MORPHOLOGY OF THE DUCK AND THE AUK TRIBES. ri7l ROYAL IRISH ACADEMY. CUNNINGHAM MKMOISS, NO. VI. i_*J 114 Cunningham Memoirs. Fig 3. 4. 5. 6. 7. 8. 14. EXPLANATION OF PLATE V. Cygnm olor ; («) cygnet 141 inches long ; skull in vertical section The same ; (a) atlas and axis ; side view, . . The same ; («?) section of the first three cervical vertebrae, The same ; (5) cygnet 15 inches long; part of atlas ; side view, The same ; (a) centrum of part of 24th cervical vertebrae ; horizontalsection near lower surface, .... The same ; (b) terminal part of spinal column ; side view Tin same ; same object; lower view, The same ; (a) distal part of wing ; inner view, The same ; («) ankle-joint; inner view, The same ; same object ; outer view, The same ; same object; front view, The same ; (b) pelvis ; lower view, Chloephaga poliocepJiala, ripe embryo ; distal pThe same ; same
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