186 



TEXTBOOK OF ZOOLOGY 



The mouth of the larger, regular zooid is located at the free end 

 and is surrounded by a tuft of ciliated tentacles. This arrange- 

 ment is known as the lophophore and has the shape of a horseshoe 

 when expanded. Within, the digestive tube is U-shaped and termi- 



3^ 



liaublt 



K rXUAVO'ELLA, 





f- 







PECTIMATELLA 



Kabi-1- " CKI^TATELLA 



Fig. 94. — Three forms of fresh-water Bryozoa showing the habit of life for each. 

 (Courtesy of General Biological Supply House.) 



nates at the anus, which is located just outside the lophophore. The 

 digestive tract is held in place by strands of mesenchymatous tissue 

 extending from the wall of the coelom. Special strands of this tis- 

 sue are termed the funiculus. The body is triploblastic and there- 



