Cea | McAtegE, Shedding of Stomach Lining by Birds. 419 
Sparrow Hawk (Falco sparverius sparverius), Navasota, Texas, 
October 11, 1905. 
Yellow-billed Cuckoo (Coccyzus americanus americanus).— Have 
seen seven instances of shedding of lining in this species; six of 
them were in a lot of eleven stomachs. 
Black-billed Cuckoo (Coceyzus erythrophthalmus).— In a lot of 6 
stomachs heavily lined with caterpillar hairs, the lining of 5 was 
cracked and peeling off. It has been noticed that among cuckoos 
taken at the same place and time, some have the stomach lining 
furred with caterpillar hairs, while others lack them. The explana- 
tion of this may be frequent shedding of stomach linings. 
Magpie (Pica pica hudsonia), Farmington, Utah, May 7, 1912.— 
Numerous pieees of old lining free in stomach, the largest tightly 
rolled up by muscular action of gizzard; new lining perfect. 
Fish Crow (Corvus ossifragus) Norfolk, Va., December 20, 1890. 
Southern Meadowlark (Sturnella magna argutula) Turtle Bayou, 
Texas, September 22, 1897.— Complete old lining somewhat worn 
and cracked, almost wholly separated from new lining, but still in 
position. 
California Thrasher (Toxostoma rediviveum) Watsonville, Calif., 
August 31, 1903.— This stomach shows a peculiar malformation 
—an inwardly projecting lobe. The lining had been molded over 
this of course, and the fact that the lining was shedding is shown 
by this hollow flap having sloughed off and its inner surfaces 
cohering. 
Mockingbird (Mimus polyglottos polyglottos).— Five cases of 
shedding or incipient shedding noted. 
Hermit Thrush (Hylocichla al subsp.) Allen’s Park, Colo., 
September 28, 1905. 
These species are scattered through the groups of birds in a way 
to suggest, that cases of the shedding of the stomach lining may 
eventually be observed in almost any species. 
CONCLUSIONS. 
A number of instances have been recorded in ornithological 
literature (see bibliography) of stomach linings being shed and 
regurgitated. This, of course, is the only form of the phenomenon 
