^rl•K^Il^•: k::p(ikt (ix thk sdUTii Georgia expedition. gg 
m;i\- lie ciiuiitcd withoiU ,<;rcat difficultv; where they lap over 
earli nther. a white area is produced e(|ual, in anv case, to the 
-Inuhle parts. 
I'assiiiL^- for the moment to the pck'ic limb, and removing;- 
the muscles, tendons and lig-aments surrounding the knee-joint. 
I find that in addition to the usual e]ji]3hysial cartilages forming 
the distal encl of the femur and the ])roximal extremity of the 
tihio-tarsus, there is a separate ossific centre for the pafclln 
as well as for the cnemial process of the tihial shaft. This 
specimen, however, is at too early a stage of develo])ment to 
definitely ascertain what the future course of ossification will 
effect in the hones in (|uestion. Xexerth.eless, as far as matters 
ha\-e ]iroceeded, tlie state of the jiarts sustain a demonstration 
of mine, which has lieen ]iuhlislied in another ])lace.' 
I'pon i-em(i\ing the thin niuscul. i-memhranous laxer C(.'Ver- 
ing tile liiwer ahdominal xi^cera, there is lirought into \ie\\ 
( h'ig. 4) the right and left lolies nf tlie li\er, the former in 
this situation lieing C(>nsidera1il\ the larger of the two and 
extends further posterii irlw The stunun-li is very largo and 
fills a good part of ihe ahd.nmnal cavUy. AnlerioVlx. the two 
lohes of ihe li\er underia]) it. The hilolied f^rmcrcas ( /^ ) is 
situated to the left side of the ahdominal caxity and opens into 
the duodenum 1)\' a single duct. 
At this stage, the s/criimii and the sewr.al hones djinposing 
tlie ])ectiiral arch <ir "sIk mlder-girdle" are ])erf(irme<l eiilirelv 
in cartilage. All their usual articulations are coni])lete. Imw- 
e\er, and lhe\- are simjily awaiting the matters of growth and 
develojiment. 
The keel of the stcrtiiini is extremel) rudimentary: the hody 
of this hiiue does iKil a])])ear to exhihit its se\er;il centers <<\ 
ossification, .and prohahh' for the reason that the latter ])!-ocess 
has iKit. at this e irl\- stage, commenced \et. In their miir]iliol- 
ogy, these element,ar\- hones foreshadow, to some degree, the 
forms tlie\- e\entuall\ possess in the adult hird. 
The greatest median, longitudinal length nf the he.art e(|uals 
]_' mm., while its greatest transxerse diameter, taken just he- 
low the auricles, e(|u;ils () mm. In the present s]iecinien, lioth 
the am-icles, as well ;is the \'essels leading into and from them, 
'SllliFELDT, R. \V. -On the Patella in the PluilacriHoracnlac." Proc. Zoi.l. Sue. Lond , 1913. 
