578 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 54. 



The convolutions of the gut were of the isocoelous type. When 

 removed from the body and dissected out, a large duodenal loop (see 

 fig 1) was found, in which the intestine was larger in diameter than 



elsewhere. The remainder 

 of the small intestine was 

 thrown out in one large 

 loop with three smaller 

 divisions indicated. The 

 remnant of the vitelline 

 duct apparently was near 

 the summit of the second 

 of these smaller divisions, 

 but it could not be made 

 out exactly and the posi- 

 tion assigned to it in the 

 accompanying figure is 

 somewhat uncertain. The 

 caeca were paired and 

 much elongated. At the 

 open end each caecum was 

 slender, while for its pos- 

 terior half each was much 

 dilated. The intestine 

 was somewhat narrowed 

 at the point where the 

 caeca were given off, and then expanded into the rectum. Measure- 

 ments of the intestine were taken as follows : 



Fig. 1. — Diagram of the intestinal convolutions in 

 Nyctibius griseus abbotti (about natural size), a, 

 Remnant of vitelline duct. 



Total length 250 



Distance from caeca to anus 30 



Length of caeca 42 



The liver (fig. 2) was bilobate, with the left division only about 

 one-fifth the size of the right. The left 

 lobe was elongate and flaplike, and meas- 

 ured 20 mm. long by 11 mm. wide. The 

 right lobe was somewhat triangular in out- 

 line, with a broad, square-angled lower 

 margin. The width of this lobe decreased 

 toward its anterior end, where it was more 

 or less squarely truncated. The external 

 margin was straight and the internal 

 border, forming one side of the cavity to 

 receive the lower end of the pericardium, 

 was sinuate. Through the center this lobe 

 was 33 mm. long. The tips of the two 

 lobes converged toward one another, though medially the right and 

 left divisions were separated by a comparatively broad space. At 



Fig. 2.— Outline of liver lobes 

 OF Nyctibius griseus abbotti 



FROM the ventral SURFACE 

 (slightly less than NATURAL 



SIZE), r, Right lobe; I, left 



LOBE. 



