1894.] 



AXATOMY OF PALAMEDEA COPOfUTA. 



537 



greatly. The two large and peculiar caeca are represented in 

 fig. 1 ; each was sacculated on a fibrous band and rapidly- 

 narrowed to a blunt-pointed extremity. We did not stretch the 

 caeca, as we desired to preserve them. Measured in a straight line 



Fig. 1. 



Caeca of Palamedea. 



from their wide aperture into the gut to their extremities the 

 left caecum was 4 inches long, the right an inch shorter. The 

 large intestine, measured from the origin of the caeca to the cloaca, 

 was 15 inches. 



§ WrND-PIPE. 



The tracheal rings are ossified; this occurs in no bronchial 

 semiring ; of these latter there were 9 in the left bronchus, 8 on 

 the right. The syrinx is deeply notched in front and behind. A 

 ligament, which ma) r represent an intrinsic muscle, passes from the 

 tracheal ring which is fifth from the end to be inserted in the first 

 bronchial semiring. The sternotracheal muscles arise unusually 

 high up the trachea. The superior pair of extrinsic muscles come 

 very close together on the ventral face of the trachea. 



