PLATE XXIX. 



Figs. 26 and 27. Distaplia confusa. (X 17-) 



26. A mature zooid. An approach to the dumbbell shape, characteristic of 

 many species of Dtstoma is shown, though imperfectly, in this figure. 



27. An immature zooid. The difference in the character of the stomach 

 walls of 26 and 27 is noteworthy. 



28. Didemtiiim strangulatum. (X I7-) Atrial siphon (rt. 5.); end piece of 

 the rectum {^r. c.) nearly cut off along with the esophagus, by the con- 

 striction. 



Figs. 31 and 32. Atnarouctiim coei. 



31. Natural size. 



32. Zooid, much enlarged. 



(264) 



