SYNOPSIS SPECIERUM. 

 CHOR1STOPUS SEM1PALMATUS. 



Cho. — Capite colloque nigro, dorso superiore alba 



SEMI PALM ATED GOOSE. 

 Cho. with the head and neck hlack, the upper part of the back white. 



FT. IN. IN. 



Length 3 4 Tarsi 4 



Bill 4 Middle toe \h 



Cho. : with the upper part of the hack, rump, and below, with the exception of the tibiae, white ; 

 the remainder and the tibiae glossy hlack ; legs and hill orange ; the nail of the latter horn colour. 



Anas semipahnata Linn. Trans, iv. 103. 



Lath. I ml. Orn. App. 69. 



iS mipalmated Goose Lath. Chen. Syn. Sup. '2, 347. 



Anas melanoleuca Lath, huh Orn. App. 69. 



Trachea Lin. Trans, vol. xv. p. 383, pi, xiii, xiv. 



Inhabits New Holland, and utters a shrill whistling note. 



Mr. Yarrell, in vol. 15, p. 383, gives the following anatomical pecularities of this bird. The 

 trachea "was situated on the outside of the left pectoral muscle, under the skin, sufficiently raised 

 under the wing that respiration would not be impeded when the bird rested with its breast on llie 

 ground, the parallel tubes being firmly attached 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 I In 

 tube, in its passage to the lungs, crosses the left branch of the furcula at a right angle, but becom- 

 ing 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 eight inches." In a 

 young bird dissected by Mr. Yarrell, the trachea was not nearly so much convoluted. 



