No. 3.] POSITION OF CHAMA. 495 
are conspicuous for their slenderness, and in the case of the 
tibio-tarsus and tarso-metatarsus, for their unusual length; the 
femur in this species is relatively very short, and is convexed 
forwards near its middle. To show some of these discrepancies 
in length we have but to present a few measurements : — 
TABLE. 
(Metric Measure.) 
SPECIES. se NE oN Ar oa ite 
Chamea fastiata......-. 3.1 cms. MOrems=) |) 3-3) cms. || 2-5 Cums. 
Parus tnornatus griseus. . .| 31 * Er tess zo. Zin ts 
Salpinctes obsoletus.....- Sites OF fs ai Bee no. “ 
Psaltriparus plumbeus... .| 18 * Relvest® Baty 5 5a ee 
As in the vast majority of all true oscines, —indeed I cannot 
recall an exception to the rule, — Chamea possesses a small pa- 
tella at the front of its knee-joint embedded in the usual tendon. 
With respect to the ¢7bzo-tarsus, its cnemial crest is seen to rise 
well above the articular surface of the summit of the bone; and 
both its pro- and ectocnemial processes are well-developed. 
Distally the condyles are very prominent anteriorly, their outer 
peripheries being nearly exactly alike in outline, and of a uni- 
form shape. 
The shaft of this bone is wonderfully straight and of nearly 
the same calibre from one end to the other. Its associate in 
the leg, the fibula, is of very diminutive proportions, freely 
attached, and ossifies for only a short distance below its ridge for 
articulation on the shaft of the tibio-tarsus. Zarso-metatarsus 
also has a straight shaft, for the most part flattened in front 
and rather sharpened behind. The hypotarsus is comparatively 
prominent, and shows both grooves and canals perforated for the 
passage of tendons. At its extremity, the mid-trochlea is seen 
to be situated the lowest upon the shaft, and all three of these 
projections are very much in the same plane, or the one, approx- 
imately speaking, in which the anterior flat surface of the shaft 
may be said to lie. 
