138 



and not quite one fourth of the length of the trunk in the Patago- 

 nian Penguin. The sacro-sciatic notch is a completeyoraw(?«. The 

 pubic bones are long and feeble ; they are turned forwards and 

 tipped with cartilage. The cotyloid cavity is a perfect Jbramen, 

 with a large process at its postero-inferior part tipped with carti- 

 lage, and articulated with the trochanter niajor. The thyroid _/bra- 

 men is not complete, except by the intervention of a ligainent which 

 separates it from the obturator Jbramen. As there is no iliacus in- 

 ternus, the superior part of tlie os ilium extends upvvards, and lies 

 close to the ribs. 



" The os femoris is formed as usual, the head being flattened an- 

 teriorly, the neck short and thick, the trochanter major smooth on 

 its superior posterior surface, and articulated vvith the process on 

 the ilium. Besides the posterior there is also an anterior linea 

 aspera. There is a process external to the external condyle, having 

 its inferior surface tipped vvith cartilage, which acts as a pulley. 

 On its infero-external surface there is a sharp edge. The condyles 

 are not much everted. 



" The shape of the patella is peculiar. There are two articulating 

 surfaces posteriorly : one which would form part of a large crescent, 

 and which has a prominence for the condyles of the Jemur in its 

 centre ; the other, inferior, is likevvise crescentic ; it is very narrovv, 

 and articulated by ligaments to the tubercle of the tibia. 



" The superior surface of ihe Jeviur has a crista i n its centre, of 

 an ovoid form : the posterior edge truncated. The internal surface 

 is perfectly flat : the oblique slightly marked with a ridge, and looks 

 downwards. There is a groove on the centre of the anterior edge 

 which also passes obliquely downwards on the external side : these 

 two sides are truncated at their junction. 



" The tibia is nearly twice the length oiihe femur : the tubercle is 

 elevated above its head, and forms a broad short conical truncated 

 process. On the anterior part of the head there is a large groove, 

 deepest at the top, and passing obliquely downwards and inwards : 

 the outer side is here smooth for articulation with the Jibiila. It 

 has inferiorly two condyles, articulated with the mdatarsus, having 

 a Jbramen above and betvveen them for the transmission of tendon, 

 &c. 



" The Jibula is in the form of a lengthened eone, and is attached 

 to the outer surface of the tibia : for about two thirds of its length it 

 is anchylosed to that bone inferiorly. It has the usual quantity of 

 surfaces for the attachment of museles. 



" There is no tarsiis. 



" The metatarsus has tvvo articular depressions on its posterior 

 surface for the reception of the condyles of the tibia. It represents 

 three pullies for articulation with the phalanges. On the inner part 

 of the superior face is situated the metatarsal bone of the first toe, 

 connected by ligaments to the large bone. There is ajbssa on the 

 superior surface, between the first and second, and second and third 



