53 
The Fulmar Petrel (. Fulmaris glacialis ), the Parasitic 
Jaeger Gull ( Stercorarius parasiticus ), the Laughing Gull 
{Zarus airicilla), and the Great Black-backed Gull ( Larus 
marinus ), are members of the order Gavidce , and are found 
along the coast of the Atlantic States; the first two have a 
very extensive range to the north. 
THE ALLIGATOR. 
The large Alligator {Alligator mississippiensis) is generally 
to be seen during warm weather in one of the compartments 
of this creek, either sunning himself on the bank or sub¬ 
merged in the water, nothing being visible but the tips of the 
ridges over the eye and the protuberance around the nostrils 
on the extreme end of the snout. This species is found in 
the rivers and bayous of the Gulf States, and is allied to the 
crocodile and gavial of Egypt and southern Asia, and the 
caiman and jacare of South America. One species of Croc¬ 
odile {Crocodilus americanus ) is also found in South America 
and Cuba, and quite rarely along the Gulf coast of the United 
States. 
No. 16.—THE CAMEL, ELK, AND 
BUFFALO PENS. 
The Bactrian, or Double-humped Camel ( Camelus bac- 
trianus ), and the Common Camel, or Dromedary {Camelus 
dromedarius), are both originally natives of Asia, where they 
now exist only under the subjection of man. The Bactrian 
Camel comes from the high, cold plains of Tartary, and is a 
more compact and powerful beast than the Dromedary, which 
