H. W. KING ON POND LIFE FROM THE VVE^T INDIES. 1 4.0 



Fig. 5. — A colony of tabular dwellings of F. tuhiformis, showing 

 constructed tubes and an adapted vegetable tube. 

 a. Extremity of Rotifer extended from tube-collecting 

 refuse to close aperture of tube. 6. Vegetable tube 

 with Rotifer swimming inside, and (cc) wall of 

 earthy particles arranged to reduce size of tube. 

 d. Accumulation of refuse closing aperture of tube. 



Fig. 6. —Rotifer embedded in sedimentary refuse. 



Figs. 7 and 8. — Quiescent forms assumed by above. 



Fig. 9. - Head of same as when first extending. 



Explanation of Plate IX. 



Fig. 1.— Magnified dorsal view of worm from Colon, West 

 Indies, a. Tapering head. h. Flexible proboscis. 

 c. Vibrating hairs, d. Anus. e. Largely-developed 

 stomach. /, Showing natural size of worm. 



Fig. 2. — Side view of head showing oesophageal bulb (a) pro- 

 truding beyond opening of mouth, and proboscis 

 thrown back as when the animal feeds. 



Fig. 3. — Ventral view of head showing aperture of mouth (a). 



Fig. 4. — Enlarged view of stomach, a & b. Bands of sphincter 

 muscles. 



Fig. 5. — Enlarged dorsal view of part of body of worm, show- 

 ing (a) attachment of hairs used in locomotion; (6) 

 muscular bands partially contracted passing along 

 each side of animal ; (c) alimentary canal ; (d) semi- 

 opaque granules in protoplasm. 



Fig. 6. — Vegetable tube inhabited by worm. a. Showing fold 

 of integument that sometimes partially covers the 

 back of the head of the worm. 



