ROLL CALL 



91 



PHYLUM VIII — MOLLUSCOIDEA — Moss animals and lamp-shells. 



Characteristics : Unsegmented, sessile, typicull}' marine, bilaterally S3'm- 

 metrical animals possessing a ridge (lophophore) bearing ciliated tentacles 

 which surrounds the mouth ; 5700 species, including fossils. 



Class I — Bryozoa — Moss animals (Electro, Pectinatella, Iletniseptella, Bugula, 

 Plumatella). 

 Characteristics: Colonial, sessile, free-living animals; mostly marine; 

 lophophore usually horseshoe-shaped ; alimentary canal L'-shaped ; divi- 

 sion into subclasses depends upon whether anus opens within or without 

 lophophore. 



Class II — Brachiopoda — Lamp-shells (Magellania). 



Characteristics : Marine organisms possessing characteristic lophophore ; 

 body covered by calcareous, dorso-ventrally arranged bivalve shell, usu- 

 ally attached by a stalk (peduncle). 



Class III — Phoronidea — (Phoronis). 



Characteristics : Small, marine, sedentary animals living in tubes ; unseg- 

 mented adults are hermaphroditic, possessing a body cavity as well as 

 characteristic horseshoe-shaped lophophore; two excretory organs and a 

 vascular system. 



