Lymphatics and Enteric Epithelium of Amia Calva 379 



and over the middle portion of the stomach constitute the 

 greater part of the tubule. As the pyloric region is approached 

 the glandular part decreases in length and disappears 

 about 2 c. m, from the pylorus ; from this point to the pyloric 

 valve the glands are lined with cells like those forming the 

 surface epithelium of this region, only shorter. In the 

 cardiac region the mouths of the glands are short and are 

 lined by ciliated cells (Fig. 4), 



The cells of the body of the gland are, for the most part, 

 cubical in longisection of the gland, but for a short distance 

 below the mouth the cells are more nearly cylindrical in out- 

 line. Several glands may open into a single mouth. In fig. 

 4 it will be noticed that the cells lining the mouth of the 

 gland are placed obliquely to its long axis. Frequently 

 cells were seen so bent that the angle formed equaled at least 

 a right angle. In all cases the convexity of the cells pro- 

 jected towards the exit of the gland ; the attached ends of 

 the cells reached a much lower level than the opposite ends. 

 In the pyloric region the glands are more widely separated 

 from each other ; the lining cells of these are situated at 

 nearly right angles to the long axis of the gland. Towards 

 the pyloric valve the glands become shorter and finally dis- 

 appear near the free edge of the valve. Cilia were not found 

 in the pyloric glands. Near the free edge of the valve-like 

 structure between the stomach and intestine, the characteristic 

 cells of the intestine appear (Fig. 9). They are slender and 

 the basal end is continued into a long thread-like process. 

 The striated border of the cells is very distinct. The varying 

 levels at which the large oval nuclei are situated, give to the 

 epithelium, when viewed in section, a stratified appearance 

 (Fig. 7). The most remarkable feature of the intestinal 

 epithelium, of Amia, is the presence of ciha in the rectum 

 (Fig. 7). The epithelial cells of this portion of the intestine 

 are of the same form as in other parts, but somewhat shorter. 

 The beaker cells are numerous and their theca are short and 

 rounded. Ciliated cells were found only within a small area 

 immediately caudad of the spiral valve. They may be 

 demonstrated much more easily and satisfactorily in a per- 

 fectly fresh condition than after hardening. 



