7 ^ Mr, Home's Description of the Anatomy 
altered in its size at this part. This process corresponds to the 
caecum : it is unlike the caecum in quadrupeds, but resembles 
that in birds, only is much smaller, and in general they have 
two; but the bittern and heron have only one. From this part, 
the colon passes up the left side, fixed to its situation by being 
attached to the omentum ; then across the body, and be- 
comes rectum, which gradually increases in size, and is very 
capacious before it terminates at the anus. 
The small intestines are four feet &ur inches long. The colon 
and rectum are one foot four inches long. 
The rectum opens externally at the root of the tail, i~ inch 
below the pelvis. On each side of the anus is a large solid body, 
about the size of the testicle, whicl||$roves to be a gland, whose 
ducts open by several orifices into did rectum. In the female, 
the same glands are met with, but of a much smaller size. 
The mesentery is free from fat ; nor are there any fatty ap- 
pendages, or longitudinal bands, on 4he colon. The mesenteric 
glands are of the size of millet-seeds^ they are numerous, and 
scattered over the mesentery. Theljtcteals are small. 
The internal surface of the stomach is uniformly smooth. 
The duodenum has valvulae connivences, which are transverse : 
these are not met with in the jejunum and ilium ; but in them 
the internal membrane is studded over with glands. There is no 
appearance whatever of valve at the beginning of the colon ; but 
there are ten dotted lines, which run in a longitudinal direction, 
at equal distances from one another, and have their origin at 
the orifice of the caecum : these dots, upon a close inspection, 
prove to be the projecting orifices of ducts belonging to the 
glands of the intestine. The cavity of the small caecum is very 
cellular, as is shown in Plate II. Fig. 3. 
