POMARINE JAGER. 643 



from 2 twelfths to 1 twelfth in width ; coeca 1^ twelfth long, | twelfth 

 wide, 1 inch 2 twelfths from the extremity ; cloaca globular, 7 twelfths 

 in width. Liver very large, the left lobe 10 twelfths long, the right 1 

 inch 2 twelfths. Trachea 2 inches 7 twelfths long, 2^ twelfths wide, 

 tapering to 1 twelfth ; the rings slender, unossified, 102 in number. 

 Bronchi rather wide, of 20 half rings. Muscles as in the other Terns. 



POMARINE JAGER. 



LeSTRIS POMARINUS, TeMM. 

 PLATE CCLIII. Vol. III. p. 396. 



Female, from Dr T. M. Brewer. The mouth rather wide, 1 inch 

 2 twelfths across ; the palate flat, with two longitudinal papillate ridges, 

 the space between which and the palatal slit is also covered with pa- 

 pillae ; anteriorly, on the mandible, are three ridges ; posterior aperture 

 of the nares oblongo-Iinear, with its margins papillate ; the lower man- 

 dible dilatable, as in the Gulls. Tongue 1 inch long, emarginate and 

 papillate at the base, broadly channelled above, contracted and indupli- 

 cate toward the end, horny beneath, and thin-edged, with the point slit 

 to the depth of 1^ twelfth. Lobes of the liver very unequal, the right 

 2\ inches long, the left 1 inch 10 twelfths ; gall-bladder oblong, 7^ 

 twelfths long, 3 twelfths broad. The stomach, c d^ is small, 1 inch 2 

 twelfths long, \ inch in breadth ; its lateral muscles thin ; the epithe 

 lium thin, longitudinally rugous, of a reddish colour. The proventricu- 

 lar glands extremely small, roundish, forming a belt 7 twelfths in width. 

 Intestine,/^ him, 24^ inches long, 6 twelfths wide at the top, but con- 

 tracting to 4 twelfths; it forms 7 curves; the coeca, jk, 1 inch 10 

 twelfths in breadth. Trachea 5 inches long, from 3| twelfths to 2| 

 twelfths long, for 8 twelfths their width is 1 twelfth, afterwai'ds 2^ 

 twelfths, diminishing to If twelfth, the extremity blunt ; rectum 2 

 inches 3 twelfths long, for 1 inch 4 twelfths in width, then enlarging 

 into an oblong cloaca 10 twelfths in breadth; considerably flattened; 

 the rings 98, unossified, of the same structure as in the Gulls. Bronchi 

 rather wide, of 20 half rings. Muscles as in the Gulls. 



The digestive organs of this bird differ from those of the Gulls only 

 in having the cceca much more elongated ; the cloaca oblong, instead of 



