80 
CRIMSON-BILLED DUCK. 
Brown, with the upper coverts velvet black, the greater ones and 
speculum brassy green. 
mM : 
Length .icovs 18 Bill cevvve 4 LAPS ss sas 1} 
Above brown, with the edges of the feathers brighter; throat 
inclining to grey; back, lesser wing coverts, and tail velvet black ; 
below the upper tail coverts and flanks grey, the latter with two or 
three deep brown spots; the breast sometimes slightly waved with 
brown; the remainder of the wing beautiful eneous green, with the 
exception of the two outer quill feathers, which are black, and the 
terminal half of the secondaries, which are white; bill and legs 
bright red in the male, fuscous in the female; bill brown, with a red 
patch on each side at the base. 
Anas Erythrorhyncha ..ccceees Spia. N. Sp. avium. 
Querquedula Braziliensis ...... Lath. 
TPCOULETU MA AID sisce res snocuscss N. 347. 
PANES DUCT, As eachaysceyeceivesss Phas vol. 2. 
RT ASMACHTIS. - as Seas ce anon seeds 
SUMS Elen ci ssh « Govswaskye ches pees: i “ieill. G. R. Gray. 
Mareca Braziliensis .icccccseeee Gen. 
PINS MOWTUG Diesalvas occa Nnce sonaes 1114, 
Inhabits South America. | 
We had an opportunity of dissecting this bird through the kind- 
ness of the Earl of Derby, who had a pair alive for some time. 
The trachea and inferior larynx is that of a typical teal. It may, 
however, be distinguished from that of Q. crecca (which it in other 
respects resembles) by the bulb being more oblique, and eqelne 
more in an upward direction. 
The tube of the trachea in both sexes is acted upon by two pairs 
of muscles of voice, the first pair the usual sterno-tracheal ones; 
in the female the second pair diverge from the tube, where it pene- 
trates the cavity of the chest, and are inserted into the membrane 
stretched between the rami of the os fureatum and the coracoids. In 
the male they diverge similarly, and are inserted in the rami of the 
os fureatum, having also a slight attachment along the internal 
surface of the membrane stretched between the rami of the 
os furcatum, which is not the case in the female. 
