332 XATUEAL HISTORY OF 



protCBiformis {Meyen), Plumatella sultana {Dumortier, 

 G. J., D. L., Alder), F. dilatata {Allman). 



Hab. : Generally distributed on submerged stones 

 and stems. 



The characteristics of the species are set forth in 

 the generic description. It grows freely^ and is often 

 much branched. The orifices are at the end of the 

 branches, and are usually in couples. The tentacles 

 number about 24, and form a campanulate corona 

 which presents a beautiful appearance. 



The statoblasts have no annulus. 



Holobranchia. Group I. Entoprocta. 



Polyzoa having both orifices of the alimentary canal 

 irithin the lophophorej tentacular sheath ivanting; ten- 

 tacles bilaterally disposed, not retractile. No perivisceral 

 cavity. — T. H. 



Order PEDICELLINEA. 

 FA:^ILY I. PEDICELLIXIDiE. 



Polypides borne on a retractile peduncle, united in 

 colonies by a creeping stolon. — T. H. 



Genus Pedicellixa, Sars. {Pes, a foot.) 



Polypides pedunculate, arranged along a creeping 

 ramified stolon ; the body separated by a diaphragm 

 from the stem, and deciduous ; tentacular crown ter- 

 minal.— T. H. 



1. P. CERNUA, Pallas. Plate XXIII. fig. 7. 



Brachionus cemuus (Pall.), Hydi-a coronata (Flem.), 

 P. echinata {Sars, Hassall, P. E. (?., G. J., D. L., Beid, 

 Sraitt, &c.), P. Belgica (P. H. G., T. K). Fleshy 

 polyps of a red colour {Ellis). 



Hab. : Common. 



This species has been described by Prof. AUman as 



