REMARKS 
ON 
THE STERNA INCA, Lesson. 

INCA MYSTICALIS, JARDINE. 
Appin, 1850. 
GeN. CHARACTERS. — Bill strong, curving to the tip; cul- 
men rounded; mandible with a marked angle; nostrils pervious, 
nearly central; edges of the mouth with a broad dilatable skin; 
wings of middle length; tail broad, forked, the outer feathers 
longest ; feet small, hallux connected to the foot by a rudimentary 
web. Type, Sterna inca, Less. 
Note.—South America, maritime; breeds on rocky islands ; 
feeds on fish. 
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