62 Charles GELDERD 



Macromysis flexuosa. 



FiG. 1 to 25. 



AU the figures, except the first hvo which are diagramniatic, are drawn with ihe caméra 

 lucida. The objectives are those oj Swift, Zeiss and Leitz. 



FIG. 1. Side view of Macromysis flexuosa. The animal is supposed to be trans- 

 parent to show the disposition of the stomach and the digestive glands. The ovary 

 has been inserted to show the overlapping of the first two tubes of the glands. 



FIG. 2. Diagram showing the dorsal aspect of the relations between the prin- 

 cipal pièces of the stomach. AB is the extent of the cardiac région; BC that of 

 the pyloric région. 



FIG. 3. Vertical section through the médian plane including the œsophagus, 

 the cardiac and the pyloric chambers. The pointed Unes in the anterior chamber 

 indicate the position of the cardiac paired plates S t. The numbers indicate the 

 ragions through which the transverse sections bearing those numbers pass. 2/3 in, X '• 



FIG. 4. Transverse section through the plane indicated 4 in the preceding 

 figure. 2/3 in, X 3. ' 



FIG. 5. Transverse section through the plane indicated 5 in fig. 3. This figure 

 passes through the œsophagus, showing the reliefs on its anterior surface. The 

 salivary glands ^5. are situated in front of the œsophagus. 2/3 in, X 3. 



FIG. 6. Transverse section through the plane indicated 5 in fig. 3, showing 

 the terminal aspect of the cardiac paired plates .S, with the teeth on their upper 

 borders. The anterior portion of the V shaped pièce p. s. m. is shown. Below the 

 stomach cavity a portion of the internai chitinous skeleton hr. sk. in the shape of 

 a bar is seen. The nuclei are those of the muscle sheath or myosarc. Isolated 

 salivary glands gs. are visible near the ascending muscles. 2/3 X 3. 



FIG. 7. Transverse section through the plane indicated 7 in fig. 3. The arms 

 or chitinous folds Connecting the cardiac pièces with folds which run above the 

 pyloric chamber are seen in br^ br^. Powerful muscle bands attached to the anterior 

 end of the médian pièce 5j are seen in m. 2/3 in, X 5. 



FIG. 8. Vertical section, parallel to the médian plane, of the posterior portion 

 of the cardiac chamber and the pyloric chamber. 2/3 in, X 5. 



FIG. 9. Vertical section outside the médian plane and slightly oblique, showing 

 a part of the latéral pièces S^ and the latéral grooves in one of the faces of the 

 médian pièce gr. S3 . The upper terminal portion of the latéral plate ^2 is seen in 

 P^k- The section has included the Connecting folds br^ and br^. The lower fold 

 bri is inserted behind the summit of the ridge c. 2 '3 in, X 5. 



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