1851.] 155 



throat and abdomen white, which is the color also of the frontal feathers of the 

 internal webs of the primaries at their bases, and of a narrow collar on the back of 

 the neck. Entire superior surface of the head, body, wings, and tail black, with a 

 greenish gloss. Tail with a band of white most observable on the inner webs of the 

 feathers, and narrowly edged with white at its end. Flanks striped with the 

 same dark brown as the broader belt of the breast. 



Hab. Venezuela. 



Obs. A bird resembling generally the several species of which Bucco macro- 

 rhynchus, Gm. is a representative, but immediately recognizable by the white bar 

 in its tail and its smaller size. I have seen only the specimen now described. '^ 



I have taken the liberty of naming this bird as a trifling tribute of respect to 

 Mr. George Ord of this city, the Nestor of American naturalists, the early and 

 constant friend and biographer of the great Alexander Wilson. 



The Committee on Dr. Leidy's new species of Entozoa, reported in 

 favor of publication in the Proceedings. 



Descriptions of new species of Entozoa. 

 By Joseph Leidy, M. D. 



1. CacuLANUS ROSEUS. Body rose-red with whitish tips, translucent, cylindri- 

 cal, robust, narrowed at the extremities ; anteriorly obtuse ; posteriorly acute. 

 Mouth elongated, surrrounded by a papillated lip, and enclosing a complex, cor- 

 neous, yellow colored, apparatus. CEsophagus consisting of two portions : the 

 first long, cylindrical ; the second short, narrow, pyriform. Ventriculus broad, 

 cylindrical. Anus very near the posterior end. Tail l-5th of a line long. 



Female. Length 1 in. to li in.; breadth 3-5ths of a line. Generative aperture 

 4 lines from the end of the tail. Ovaries two, white, very tortuous. 



Male .Length 6 to 10 lines : breadth i a line. Penis composed of two, white, 

 curved, spicul^e, 4-5ths a line long, protruding close to the anal aperture. 



Habitation. I found 580 adult specimens and many thousand young of this spe- 

 cies in the intestine of a Tortoise (Testudo ) from Java. About one- 

 fourth of the number were males. 



2. AscARis Felis discoloris. Body yellowish-white, sub-cylindrical, with pro- 

 minent longitudinal lines ; posteriorly acute ; anteriorly moderately narrowed 

 with the extremity furnished with a narrow lateral alaform expansion undulated 

 at the free edge. Mouth distinctly trilobed. Tail short; anus just anterior to 

 the point of the latter. 



Length 1 in. to li in. ; greatest breadth at the posterior third i a line ; posterior 

 to alaform expansion J of a line ; length of latter 1 line ; greatest breadth at base 

 1-lOth of a line. Annulations l-570th in. wide. 



Hibitation. Six females obtained from the small intestine of Felis discolor. 



3. Spiroptera Bidelphidis virginiance. Body whitish, cylindrical ; anteri- 

 01 ly narrowed, sub-acute ; posteriorly curved, acute, furnished with a broad, in- 

 flated, lateral, alaform expansion of the integument, pierced on each side of the 

 body with five minute respiratory tubes opening at the free edge of the expansion. 

 Integument on the ventral surface, between the lateral expansions, presenting a 



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