INTRODUCTION. Cxli 



Subclass HOLOBEANCHIA, 



Group b. — Entoprocta, Nitsche. 



Both the orifices of the alimentary canal within the 

 lophophore. 



Order PEDICELLINEA. 

 Only order. 



Family I. — PedicellinidsB. 

 Pedicellina, Sars. 



Family II. — LoxosomidaB. 

 LoxosoMA, Keferstein. 



Subclass PTEROBRANCHIA, Eay Lankester. 

 AsPiDOPHORA, AUman. 



Lophophore produced on each side into a process 

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

 forming discontinuous series. 



Order PODOSTOMATA, Ray Lankester. 

 Foot large, overhanging the mouth. 



Family Rhabdopleuridse. 

 Rhabdopleura, Allman. 



