APPENDIX 487 



INFUSORIA. Protozoa with cilia or sucking tentacles (286). 

 [CILIATA]. Locomotor, with cilia : Holotricha (Parame- 

 cium, 287); Hetehotricha (287); Pebithicha : Vorticella (288). 

 [SUCTORIA]. Sessile, with sucking tentacles (288). 



C(ELENTBRATA 



Animals of radial structure whose digestive cavity is lined by the 

 body- wall (262). 



[SPONGIARIA] 



Coelenterata whose body-wall is perforated by incurrent pores 

 (262). 



[CNIDARIA] 



Coelenterata whose body-wall is not perforated by incurrent pores, 

 and which have nettling organs of some sort (264). 



HYDROZOA. Cnidaria whose body is composed of more than 

 two rays and contains a simple cavity. Hydromedus.b, attached 

 Hydrozoa in hydroid stage ; medusa simple : Hydroidce (266) ; 

 Hydrocorallidce (267) ; Tuhularidm (267) ; Campanularidw (267) ; 

 Trachomedusw (Zygodaotyla, 271). Siphonophoba, a free swim- 

 ming colony of Hydrozoa (271). 



SCYPHOZOA. Cnidaria with many radii, and with radial parti- 

 tions in cavity of body (273). 



CTENOPHORA. Cnidaria with only two radii, and rows of 

 cilia-plates (27.5). 



SCOLECIDA 



Animals of worm-like form, with bilateral, unsegmented body. 



PLATYHELMINTHES. Bilaterally symmetrical, soft-bodied 

 animals, without true segmentation of the body ; flattened in a 

 dorso-ventral direction, and having body-cavity filled with a loose 

 meshwork of cells. Turbellaria, free-living flatworms whose body 

 is covered by cilia ; alimentary tract with only one opening to the 

 exterior: Planaria (191). Trematoda, parasitic, without cilia in 

 the adult ; the mouth leads into a forked food-canal without anus : 

 Distomum (193). Cestoda, elongated tape-like intestinal parasites, 



