INTRODUCTION. Cxli 



Subclass HOLOBRANCHIA, 



Group b. ENTOPROCTA, Nitsche. 



Both the orifices of the alimentary canal within the 

 lophophore. 



Order PEDICELLINEA. 

 Only order. 



Family I. Pedicellinidae. 

 PEDICELLINA, Sars. 



Family II. Loxosomidae. 

 LOXOSOMA, Kefersteiu. 



Subclass PTEROBRANCHIA, Ray Lankester. 

 ASPIDOPHORA, Allman. 



Lophophore produced on each side into a process 

 (plume), on which alone the tentacles are developed, 

 forming discontinuous series. 



Order PODOSTOMATA, Ray Laukester. 

 Foot large, overhanging the mouth. 



Family Raabdopleurid*. 

 RHABDOPLEURA, Allman. 



