217 



it i probable that shorter pair of free rib* mar have been attached to the fourtmith 

 cervical vertebra. The firt four cerriciJ vertebra* hare a tingle hypapophysis ; the sixth 

 to the truth have a pair of hypapophyse* ; the inferior process U again single, from the 

 elevrnth to the fourteenth vertebra: inclusive ; it bifurcates into a pair of broad diverging 

 plate* in the first three donal vertebra*, and become* a tingle compressed plate in the rest. 

 The unusual development of the hypapophysis relate* to the great sise and strength of the 

 inferior muscle* of the spine, which combine with other muscles of the trunk in the shuffling 

 tovrim-nt by which the Penguin, like the Seal, make* progress, prone on its belly, along 

 dry land. 



The scapulae are unusually long and broad : the coracoids are of great length and strength, 

 and rest on groove* which occupy the whole anterior border of the sternum. The furculum 

 it strong, curved, with its apex at some distance from the keel to the sternum. The bones 

 of the fin-like wings are compressed, as in the paddles of the Cetacea. The femur is short 

 and thick : the patella unusually large : the fibula* almost as long as, and distinct from, the 

 tibia : the groove for the extensor tendons is bridged over with bone. There are eight caudal 

 vertebra*, the last of which is long and stylifonn. 



Prepared from a specimen captured in the Antarctic Expe- 

 dition o/Capt. SirJ. C. ROM, R.N., F.R.S., and presented 

 by R. M'Cormick, Esq., R.N., Surgeon to the Expedition. 



1119. The skull, covered by the dried skin, of the Patagonian Penguin (Aptenodytet 

 paiackonica). Presented by Sir Jl'm. Wizard, F.R.S. 



1120. The skull, partially disarticulated, of the Patagonian Penguin (Jptenodyte* 

 patackonica). 



It differs from that of the Apt. antarttiea in the greater length and (tenderness of the 

 bill. The superorbital ridge is similarly impressed by the cavities for the superorbital glands. 

 The parocripiul, mastoid, and postfrontal processes are well-marked. The occipital condyle 

 sinks below the level of the basioccipital. The interorbital septum is incomplete behind, and 

 the cranial parietes there present three wide vacuities. The hsemapophysial part (angular, 

 surangular, and articular elements) of the lower jaw ha* not coalesced with the hssmacanthal 

 part (deuUry element) ; but this is confluent anteriorly with the corresponding part of the 

 opposite ramu*. 



Hunter ian. 



1121. The atlas of the same Penguin (Aptenodyfes patackonica). 



The neurapophyse* are separate above, not confluent as in the skeleton of the Aptenodyttt 

 axtarthca. The hypapophysis is lest developed than in that specie*. 



Hunterian. 



2 r 



