RECORDtS, VOLUME XI, MARCH, 1919. 51 



In the onh^ specimen of the Booby that 

 has come into my hands to dissect, in which 

 unfortunately the tongue and larynx were 

 missing, the trachea is simple, without dila- 

 tation, and is regularly cylindrical for at least 

 the lower half, but is slightly enlarged at 

 the larynx. 



The sterno-trachealis has its origin about 

 .50 above the syrinx, fig. 2, C; m, the tra- 

 chea; b, the bronchial tube. There is a thin, 

 strap-like bronchialis which descends the tra- 

 chea and adhers to the last syringeal ring. 

 Below the insertion of this m\iscle, and ren- 

 dered tense by it, is a syringeal vibrating 

 surface between the last syringeal ring and 

 the upper bronchial semiring, in figure op- 

 posite u. 



The bronchial tubes are composed of twen- 

 ty or more semirings which adhere together 

 at their syringeal junction for a space occu- 

 pied by five semirings, above small tympans. 



Although I have seen the Boobys many 

 times, I have never been on their breeding. 



