SULA CORYL 



Sula coryi Mayn. 



SULA CORYI. 

 Cory's Gannet. 



Contributions to Science Vol. I, March 4th. 18S0. 



DESCRIPTION. 



Pp Ch Color, similar to that of the Cnnraon Gannet, Sula bassana. but the form and size are those 

 of the Red-faced Gannet. Sula piscator. Form, rather slender. Size, small. Bill, <imte smooth The gu- 

 la sac is not prominent nor much .vrinkled. The feet are rather slender: the tarsus about half the length 

 of the middle toe and claw. The claw of the midille toe is pectinated, the notches being irregular. \V mgs, 

 loner narrow and p.unted. Tail, pointed, the two central feathers being one-fourth longer than the next pair, 

 then the o-raduation is about .75. but the other is not quite one-half as long as the middle. 



yiiil,. 



h 

 Fig. is. 



The oesophagus of Cory's Gannet is dilatable, and is 10.-50 long, and opens into a wide proventriculus, 

 .90 in diameter for its entire length, see Fig. 15, C, where is given a cut about one half life size. The glands 

 are numerous and lie in longitudinal ridges. They are cylindrical in form, (see ib, C, where is given a fig- 

 ure of one greatly enlarged ) liut are of unequal length on account of the convex fonn of the ridges, see ib.L, 

 where is given a life size section of one of the ridges. 



The trachea of Cory's Gannet is much flattened at the superior larynx, see Fig. 14, A, where is given a 

 section at the first ring, but becomes smaller as it descends, see ib. B, where is given a section of the tra- 

 chea at the junction of the sterno trachealis, and thus there is no dilatation of the trachea. 



The sterno tracheal muscles are very large, see Fig. 14 s s, Fig. 18 s s, and Fig. 17 E, s. 



