1848.] 87 



inches (Fr.) in length ; the ccECum measures two inches five lines in length ; the 

 mucous memhrane of the large intestine is of a greenish olive tint throughout; 

 the isolated crypts are very distinct ; the small intestine measures six feet two 

 inches ; the mucous membrane is apparently healthy, of a pale onion tint, slightly 

 reddened in portions ; the isolated glands are very numerous near the upper ex- 

 tremity of the duodenum; there are no valvuloe conniventes ; eight plaques of 

 Peyer are counted in the ileum ; the largest is about one and a half inches in 

 length; the mesenteric glands are healthy; the kidneys ave of nhrick-red colour; 

 tissue healthy; bladder not examined. 



The committee to whom was referred the following catalogue of 

 Mexican Birds, reported in favor of publication. 



Catalogue of Birds collecled hy Mr. Wm. S. Pease, during (he march of the Army 

 of the United Slates from Vera Cruz to the City of Mexico. 



By John Cassin. 



Upon publicity being given to the fact that the Department of War of the 

 United States of America intended sending an expedition, to consist of both Naval 

 and Military forces, against the city of Vera Cruz, Mr. Wm. S. Pease, Meniber 

 of the Lyceum of Natural History of New York, and Correspondent of the 

 Academy of Natural Sciences of Philadelphia, proposed to embrace an opportunity 

 which would thus probably offer, of his accompanying the military force into 

 Mexico. 



Having succeeded in effecting a suitable arrangement, Mr. Pease joined the 

 army under General Scott, at Vera Cruz, and continued with it until the final 

 evacuation of the country. 



The facilities for collecting and for observation possessed by Mr. Pease were 

 necessarily of a restricted character, resulting from the position of the army 

 in a hostile country, and particularly so during the marches, when it 

 was constantly attended by bands of armed inhabitants, or guerillas, 

 who hovered in its vicinity for the purpose of committing depredations 

 upon persons who ventured away from the main body. Notwithstanding all 

 disadvantages, however, Mr. Pease made very interesting collections of birds, 

 insects, and other productions of the country. 



Mr. Pease represents himself as particularly indebted to Col. G. W. Hughes of 

 the 1st Regiment Maryland infantry, and to'Olis Hoyt, M. D., Surgeon of the Mas- 

 sachusetts volunteers, and medical director of the general hospital at Jalapa; whose 

 kindness and encouraging treatment of Mr. Pease, are honorable to those gentle- 

 men as friends of science, and worthy of the character of American officers. 



1. Spizaetus tyrannus, (De Wied) PI. col. 73. 



From the neighbourhood of Perote, rare ;— an adult female. 



2. Herpetotheres cachinnane, (Linn.) Viell. Gal. 19. 



3. Falco sparverius, Linn. Aud. Birds of Am. pi. 42; 



Mr. Pease observes : " Only found about the upper part of the tierra iemplada, 

 very common." 



4. Asiur nitidus, (Lath.) PI col. 87. 



5. Micrastur guerilla, nobis (n. s.) 



