PALUDICELLAIDj; : PALUDICELLA. 405 



33. FREDERICELLA,* P. Gervais. 



CHARACTER. " Polypidom fixed, coriaceous, tubular, branch- 

 ed. Polypes issuing from the extremities of the branches ; 

 tentacular disc orbicular ; tentacula arranged on the margin of 

 the disc in a single series, less numerous than in Plumatella 

 (about 24), invested at their origin by a membrane" Allman. 



1. F. SULTANA, the erect polype-tubes cylindrical. Rev. Dr. 

 Fleming. 



Tubularia sultana, Blumenb. Man. 272, pi. 1, fig. 9. Base Vers, iii, 93. Plumatella 

 gelatinosa, Flem. Br. Anim. 553. Fredericella sultana, Allman in Ann. and Mag. 

 X. Hist, xiii, 331. W. Thompson Rep. Brit. Assoc. 1843, p. 285. Couch Corn. 

 Faun, iii, 135. 



Hob. Lochmill-loch, Fife, Fleming. Near Foulden, Berwick- 

 shire, SirJ. G. Dalyell, Bart. On the weeds in the ponds at Treng- 

 wainton, near Penzance common, JR. Q. Couch. Bandon, Dublin, 

 G. J. Allman. 



" Height about two inches, tufted, shrubby; stem dichotomously 

 branched, scarcely enlarging at the extremity ; polypi with a bell- 

 shaped disc, the tentacula regularly disposed, and appearing as if 

 webbed at the base ; mouth with a valve." Fleming. 



2. F. DILATATA, " polypidom dilated towards the apertures.' 1 '' 

 Allman. 



Fredericella dilatata, Allman in Ann. and Mag. N. Hist, xiii, 331. 



Hob. Fresh waters. Dublin, G. J. Allman. 



FAMILY PAL UDICELLAID^. 

 34. PALUDICELLA,! Gervais. 



CHARACTER. " Polypidom fixed, coriaceous, consisting of a 

 single series of claviforrn cells with a catenulated arrangement ; 

 apertures unilateral, tubular, placed near the wide end of the 

 cell. Tentacular disc of polypes orbicular, bearing upon its 

 margin a single series of tentacula ; tentacula free" Allman. 



] . P. ARTICULATA. (Fig. 77.) W. Thompson. 



Paludicella articulata, G. J. Attman in Proc. Roy. Irish Acad. an. 1843, with a plate 

 Ann. and Mag. N. Hist, xiii, 331. 



* Name in honor of Frederick Cuvier. 



t Formed from paltts, a marsh, and cella, a cell. 



