PALUDICELLAID.E : PALUDICELLA. 405 



33. Fredericella,* P. Gervais. 



Character, — '"'' Poli/pidom fixed, coriaceous, tubular, hranch- 

 ed. Polypes issuing from the extremities of the hranches ; 

 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 origiii by a, membrane.'''' Allman. 



1. ¥. iivi.TM'i A, the erect polype-tubes cyl'mdrical. Rev. Dr. 

 Fleming. 



Tubularia siiltana, Blumenb. Man. 272, pi. 1, fig. 9. Bosc Vers, iii, 93. — Plumatella 

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

 N. Hist, xiii, 331. W. Thompson Rep. Brit. Assoc. 1843, p. 285. Couch Com. 

 Faun, iii, 135. 



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

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

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

 G. J. Alhnan. 



"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, " polyp'idom dilated towards the apertures!''' 

 Allman. 



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

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



FAMILY— PALUDICELLAID^. 



34. Paludicella, j- Gervais. 



Character. — " Polypidom fixed, coriaceous, consisting of a 

 single series of claviform cells with a catenulated arrangement ; 

 apertures miilateral, fubidar, placed near the wide end of the 

 cell. Tentacular disc of polypes orbicular, hearing uijon its 

 margin a single series oftentacida ; tentacula free.'''' Allman. 



]. P. ARTicuLATA. (Fig. 77.) W. Thouipson. 



Paludicella articulata, G. J. Alhnan 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 palus, a marsh, and cella, a cell. 



