56 



INVERTEBRATE ANIMALS. 



thirdly^ an asaemblage of zooids produced by budding or fission from 

 a primitive being, but not necessarily remaining connected with one 



Vv^. 29. —A, Part cf tliC foloiiy of lirnigaiuviUca museum; one of tlie eoiiipound 

 Ilndroziui, nl' tin,- nutaral jsize. B, Part of tlie same eiilarj^i d : ji A polypitf. fully 

 expainled ; m An incompletely developed rein-oductive bud ; vi' A more comi>letely 

 developed reproductive l.)ud ; /"Co^nosarc witli its investing periderm and central 

 canal. C, A free reproductive liud or mednsiform gonopliore of the same : n Gono- 

 calyx; )' Mariulirknn ; c Due of the radiatin^j; jj:astro vascular canals; o Ocellus; 

 V Velum ; t Trntaele. (After Allinan.) 



;i.tintlier or exhibiting any c<iinmon features of likenesw, as we shall 

 we is tlie case in ni;iny of the IJijdncoit. Lastly, cases may occur 

 iu wliicli the individual consists ]>;irtly of similar zooids which 



