198 

 1. MERGANCER. GOOSANDER OR JACK-SAW. 



M. subcristatus albus, capile collo supremo dorso 

 remigibusque nigronitentibus, canda cinerea. 

 Lath. 



The bill is three inches long, black on the upper 

 part and crimson on the sides ; the irides are red ; 

 the head is covered with feathers, which are erected 

 as a crest, bottle green ; the neck, breast . and belly 

 are pale yellow ; the upper part of the back and 

 scapulars are black ; the middle of the rurnp^ and 

 back ash colour; the tail consists of 18 feathers; 

 the legs are scarlet, like red sealing wax. 



The female has the head ferruginous ; the back 

 and tail ash colour. 



The labyrinth or bony process on the wind pipe 

 is situated just above where the trachia divaricates 

 to supply the lungs, and has been compared by Wil- 

 loughby to two powder puffs. 



The female has no labyrinth. 



2. CASTOR. DUN DIVER OR SPARLING FOWL. 



M. cristatus cinereus, capite colloque supremo spadi- 

 ceis, gula remigibus intermediis abdomineque al- 

 bis. Lath. 



The lower mandible and irides are red ; the head 

 and upper part of the neck are deep chesnut ; the 



