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



arching over ihe opcning. Moulh terminal with a denticle on 

 each side. 



B. mirabilis Johnst. Engl. Küste. — B. amlralis n. sp. Patagon. 

 Küsten. 



§§ B i - ni II 1 1 i s e r 1 a I a r i a. 



Fain. Far r- iniin ariadae. (Cclls disposed round an imagi- 

 nary axis, alternate, forming cylindrical branches of an erect, dicho- 

 toinously divided, continuous polyzoary.) 



Gen. Farciminaria n. Corneous, flexible; margin of cell 

 much raised ; aperture occupping the whole front of the cell. Ovicell 

 cucullate. 



F. aculeata n. sp. Neuseeland. 



Farn. Gemellaridae. (Cells apposite in pairs.) 

 Gen. Gemellaria v. Ben. Cells jointed back lo back; all 

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

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

 secundary pair. 



G. loricata (L.) Sav. Europ. Küsten. 



Gen. Didymia n.* Cells joined side to side. Aperture large, 

 oval, wholly anterior. Cells all facing the same way. At a bifur- 

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

 pair at the summit. 



D. Simplex n. sp.* ßass-Str. 



Gen. Diinetopia n.- Cell joined back to back. Aperture 

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

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

 disjoined cells gives off a secundary pair. 



D. spicata n.sp.* — D. cornula n, sp.* Beide in der ßass-Str. 



Gen. Notamia Busk. A pair of tabacco-pipe shaped avicu- 

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

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



iV. bursaria (L.) Flem. Engl. Küste. 



Farn. C aber eadae. (^Polyzoary dichotomously divided into li- 

 gulate, bi-multiserial branches; on the backs of which are vibracula 

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



Gen. Caberea Lamx. Cells bi-nmltiserial, in the latter case 

 quincunclal. Back of branches covered with largo vibracula, which 

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

 Irom the middle like , where the vibracula of eithcr side decussate 

 with those of the other. Avicularia, when present , sessile on the 

 front of the cell. 



C. rudis n. sp.* ßass-Str. — C.Boryi n. sp.* Cumberlands-Ins., 



