126 



MANUAL OF ZOOLOGY 



band. The cilia of each row are cemented together at 

 their bases, free from one another distally, so that each row 

 is comb-shaped, the basal cemented parts of the cilia 

 forming the back of the comb, the free portions the teeth. 

 It is by the paddling action of the numerous swimming 



Tntk 



— Hormiphora (Cydipfie) plumosa. A, from the side; B, from the aboral 

 :. inth, month; s. pi, swimming plates; t and b, tentacles. Natural size. 



liW^inoTn Vi*-3 f 4 (lor Phnn ^ 



Fig. 65. 



pole. />an, 111UUL11, j.y'i, awiiiiimi. 



Mediterranean Sea. (After Chun.) 



combs of these eight bands that the ctenophore is propelled 

 through the water. 



Laterally there is situated a pair of long slender tentacles, 

 each provided with numerous little tag-like processes, and 

 having its base lodged in a sheath into the interior of which 

 the whole tentacle can be retracted. At one pole, the oral, 

 is an opening, the mouth : and at the opposite pole is 

 a pair of minute pores, the excretory pores, which are the 



