der niederen Thiere während der J. 1854—1855. 399 



arching over llie opening. Moulh terminal with a denticle on 

 each side. 



B. mirabilis Jolinst. Engl. Küste. — B. auilralis n. sp. PatagOD. 

 Küsten. 



§§ B i - Dl u 1 1 i s e r i a I n ri a. 



Fain. Farciminariadae. (Cells disposed round an imagi- 

 nary axis, alternate, forming cylindrical branehes of an crect, dicho- 

 tomously divided, continuous polyzoary.) 



Gen. Far ciminaria n. Corneous, flexible; margin of cell 

 much raised; aperturc occupping tlie wttole front of the cell, üvicell 

 cucullale. 



F. aculeata n. sp. Neuseeland. 



Farn. Gemellaridae. (Cells apposite in pairs.) 



Gen. Gemellaria v. Ben. Cells jointcd back to bacU ; all 

 the pairs facing the same way. Aperlure oval, slightly oblique; at 

 the bifurcation each cell of the primary piiir giving off one of the 

 secundary pair. 



C. loricala (L.) Sav. Europ. Küsten. 



Gen. DidyjHia u.'-^ Cells joined side to side. Aperture large, 

 oval, vvholly anterior. Cells all facing the same way. At a bilur- 

 cation each cell of the primary pair giving off one of the secundary 

 pair at tlie sumniit. 



D. iimplex n. sp.^* Bass.Str. 



Gen. Dirne topia n.* Cell joined back to back. Aperlure 

 oblique; each pair looking in a direction at right angles with that 

 of Ihe next. At a bifurcation the pair being disjoined , each of ihe 

 disjoined cells gives off a secundary pair. 



D. spicata n.sp.* — D. cornuta n. sp.*^ Beide in der ßass.Str. 



Gen. Nolamia Bush. A paU of tabacco.pipe shnped avicu- 

 latia visible above each pair of cells, each arising from the inferior 

 tubulär Prolongation of one of the cells in the pair next above. 



IV. buriaria (L.) Flem. Engl. Küste. 



Kam. Cabtreadac. (^Polyioary dichotomously divided into li. 

 gulate, bi.multiserial branehes ; on Ihc backs of which are vibracula 

 or avicularia, one common to several cells; avicularia sessile.) 



(jen. Caberea Lamx. Cells bi.niultiserial, in the latter case 

 quincunctal. Back of branehes covered with large vibracula, which 

 are placed obliquely in two rows , diverging in an upward direction 

 from the middlü like, wliere the vibracula of either side decussate 

 with tliose of tlie othcr. Avicularia, when prcsent, sessile od the 

 front of the cell. 



C. rudis n. >p.* Bass.Str. — C. Boryi n. sp.* Cumberlands.In«,, 



