( 642 > 



NODDY TERN. 

 Sterna stolida, Linn. 



PLATE CCLXXV. Vol. III. p. 516. 



Width of mouth 9 twelfths. Tongue 1 inch 3 twelfths long, very- 

 slender, tapering to a horny point, grooved above, emarginate and pa- 

 pillate at the base. OEsophagus 4 inches 4 twelfths long, its width 

 along the neck 8 twelfths, within the thorax dilated as in the last spe- 

 cies, its breadth 1 inch 1 twelfth ; the proventricular belt 4 twelfths 

 broad. Stomach very small, 10 twelfths long, 8 twelfths in breadth, of 

 the same structm-e as in the last. Lobes of liver 1 inch 2 twelfths and 

 11 twelfths ; gall-bladder oblong, 6 twelfths in length, 3 twelfths in 

 breadth. Intestine 13 inches long, 2^ twelfths wide at the commence- 

 ment, 1^ twelfth towards the rectum ; coeca 2^ twelfths long ^ twelfth 

 wide, 1^ inch from the extremity ; cloaca ovate, 7 twelfths in width. 

 Trachea 3 inches long, ft-om 2| twelfths to 1| twelfth in breadth, 

 roundish ; the rings 110, very feeble. Bronchi very wide, one with 26, 

 the other with 24 half rings. 



BLACK OR SHORT-TAILED TERN. 



Sterna nigra, Linn. 

 PLATE CCLXXX. Vol. IIL p. 535. 



Tongue 1 inch in length, very slender, grooved above in its whole 

 length, tapering to a very j&ne horny point, which is a little slit. (Eso- 

 phagus 3J inches long, | inch wide, within the thorax dilated to a very 

 large sac, 9 twelfths in breadth. Stomach of moderate size, roundish, 

 8 twelfths long, 7 twelfths broad ; the lateral muscles moderate, the 

 tendons large, the epithelium dense, with large longitudinal rugae. The 

 proventricular belt 8 twelfths in breadth. Intestine 12^ inches long. 



