24 
both to the muscle and the skin by cellular tissue. The clavicle on © 
the right side of the bird is of the usual character, but that on the 
left is both shorter and wider, having an aperture about the middle, 
the sides diverging, with a projecting point on the inner side, to 
which the tube of the trachea is firmly attached about two inches 
above the bone of divarication. The trachea lying on the left side 
of the bird, the lower portion of the tube, in its passage to the lungs, © 
crosses the left branch of the furcula at a right angle, but becoming 
attached to this projection of the clavicle, receives from the point 
described its centrical direction into the body. The whole length of 
the windpipe in this bird is four feet éight inches.” In a young bird — 
dissected by Mr. Yarrell, the trachea was not nearly so much 
convoluted. 
PLECTROPTERUS RUPPELII. 
Piec, subtus brunneocatro ; alis albis. 
RUPELL’S GOOSE. 
Puec. bronze-black below, and wings white. 
FT, IN. IN. IN. | 
Length... 3 1 Metatarsi... 44 Middle toe... 34 
Puec. glossy-bronze, black; anterior portion of the wings and 
belly white ; bill dark, red legs, and feet lighter. 
Plectropterus ruppelit s.scceree Sclater Proc. Zool. Soc. 1860, 
p. 42. 
oe 
Gambensis Rup. 
From Central Africa. 
PLECTROPTERUS GAMBENSIS. 
Plec.—Ater ; subtus albus. 
GAMBA GOOSE. 
Puxc. black; below white. 
IN. IN. IN. 
Length... 394 Naked part of the bill... 5 Tarsi... 5 
Purc.: smaller wing coverts, belly, neck, and thighs white; the 
remainder deep purplish black; spur on the wing of the male one 
