226 
Dr. Kidd on the 
with the stomach, are not far removed from it ; and like the 
stomach, contain numerous pebbles, which are both smaller 
and smoother than those of the stomach itself, as being only 
destined to act on food already partially digested. The ana- 
logy on which I have just insisted, is strengthened by the 
fact, that there are very large duplicatures of the internal 
coat of the caeca of the ostrich, as in the corresponding parts 
of the mole-cricket. I either therefore misunderstand, or can- 
not agree with. M. Marcel de Serres, the author of a very 
interesting paper on the Intestinal Canal of Insects, published 
in the 76th vol. of the Journal de Physique ; who seems to 
attribute to the geca above described, the office of an hepatic 
organ, and calls them “ Vaisseaux hepatiques superieures” in 
contradistinction to another organ situated lower down in 
the intestines, and acknowledged by all to be of an hepatic 
character. 
From the common base of the two caeca a very narrow 
but powerfully muscular tube, which might with much pro- 
priety .be called the jejunum, passes onwards for a very 
short space, and terminates in a large intestine ; this intes- 
tine, which is eight or ten times the diameter of the jejunum, 
contracts very gradually as it proceeds, till, near the extre- 
mity of the rectum it swells out very considerably. This 
large intestine is slightly convoluted in its course, and is 
usually more or less distended with a black pasty matter re- 
sembling soft clay. Among the contents of the upper part 
of this large intestine were almost invariably found from ten 
to twenty worms, of a white colour, and of a shape resemb- 
ling the lumbricus teres of the human intestines, but thicker 
in proportion to their length, and narrowing more suddenly 
