8 Messrs. Hancock and Embleton on a Gymnetms 



blunt blind extremity, PI. II. figs. 2 & 3 c. The canal in which 

 the caecal prolongation is lodged is prolonged for an inch or two 

 beyond the end of this latter, and contains several small blood- 

 vessels, and the cellular coating of the caecum arranged in cords, 

 the vessels being gradually lost by passing backwards and out- 

 wards into the surrounding muscular tissue, the cellular cords 

 being attached to the sides of the termination of the canal. 



The anterior main part of the stomach, when laid open, was 

 quite empty, the inner surface of the oesophagus and stomach as 

 far as 2 in. below the pylorus perfectly uniform and smooth ; 

 from the point here indicated, the upper wall of the stomach 

 presents the gradual beginnings of a few longitudinal plicae, on 

 tracing which backwards they are found to increase in number 

 until at 5 in. in front of the anus the whole inner surface of the 

 tube is provided with them. They are continued on in the 

 stomachic caecum to within 2 or 3 inches of its termination. At 

 about halfway along this caecum was found a small quantity of 

 the spawn of some fish partially digested, several of the ova being 

 still entire ; a little way in front of these was an angular bit of 

 cinder. 



The pylorus, fig. 3 d } coming off as above mentioned from the 

 most enlarged part of the stomach, extends for only 1 \ in., when 

 it becomes suddenly constricted and presents internally the usual 

 circular valve. 



The duodenum, figs. 2 & 3 e, beyond is a cylinder of about 

 1 in. in diameter and 1 ft. in length, perforated all round by 

 very numerous circular openings, the orifices of the pancreatic 

 caeca, which measure about \ inch in diameter and 1 inch in 

 length, and completely mask the whole duodenum. This part 

 of the tube extends forwards, lying parallel to and beneath the 

 stomach, and overlapped by the posterior lobes of the liver for 

 about 4 in., and then emerging as it were from the pancreatic 

 caeca is continuous with the remainder of the intestine, figs. 2 & 

 3//, which then is suddenly bent backwards and runs along the 

 lower border of the pancreas obscured by the caeca of the right 

 side, and then keeping along the floor of the abdominal cavity it 

 passes on as a straight tube to the anus, figs. 2 & Zg, at the 

 front of which it opens separately. The diameter of the duode- 

 num is diminished one-half at its exit from the pancreas, and the 

 intestine continues of the same size to within an inch or two of 

 the anus, where it is gradually lessened to about \ inch. The 

 length of the intestine from duodenum to anus is 3 ft. 5 in. The 

 inner surface of the intestine below the duodenum presents a 

 very delicate honeycombed texture, the laminae being fine, of 

 varying size, and crossing each other in all directions, the largest 

 standing up pretty high and taking a longitudinal course. This 



