( 466 ) 



GREAT CAROLINA WREN. 



Troglodytes ludovicianus, Bonap. 



PLATE LXXVIII. Vol. I. p. 399. 



This bird rarely extends its movements eastward beyond the State 

 of New York, and has not, T believe, been seen in Massachusetts. I 

 found it very numerous in the Floridas and all along the coast of the 

 Mexican Gulf to within the Texas, where it spends the whole year. 

 Dr Town SEND mentions it as being found on the Missouri. 



The roof of the mouth is flat with two slight ridges on the palate, 

 and a prominent median line anteriorly, the posterior aperture of the 

 nares linear, 4 twelfths long, papillate ; the 

 tongue 7^ twelfths long, very slender, 1^ 

 twelfth broad at the base, where it is emar- 

 ginate and papillate, channelled above, taper- 

 ing to a rather obtuse bristly and horny point. 

 The width of the mouth is 4 twelfths. The 

 oesophagus, abc, isl inch 9 twelfths long, 3 

 twelfths in width ; the proventriculus, b c, 3^ 

 twelfths. The stomach, cde, is elliptical, a 

 little compressed, 7^ twelfths long, 5^ twelfths 

 broad ; its muscles moderate, the lower very 

 thin, the tendons rather large ; the epithe- 

 lium tough, with large longitudinal rugae, 

 and of a reddish-brown colour. The contents 

 of the stomach are insects and seeds. The in- 

 testine, efph, is 5 inches 9 twelfths long, its 

 width 11 twelfth ; the cloaca, j, globular, 6 

 twelfths in width ; the coeca, i, 1^ twelfth long, 

 and ^ twelfth wide. 



The trachea is 1^ inch long, considerably 

 flattened, scarcely 1 twelfth broad at its widest part, and contracting 

 to ^ twelfth ; the rings 58, with 2 additional dimidiate rings. The 

 muscles as in all the singing birds, those of the inferior larynx consi- 

 derably developed. Bronchial half rings about 15. 



There is a pretty large oblong salivary gland in the usual place, 

 opening with a single duct into the fore part of the mouth. 



