132 



IXVKUTEISRATE ANIMALS. 



pseuuobftnial system being visiljle through the transparent in- 

 tegument. 



Fi^. s:'.. — ()li;;nr]i;rta. A, Aiit,<-rinr ].nriion of Tnhifix rirnhvuvl, enlarged: j) 

 rii;i]yiix ; ; / Alim.ntny eiiiial ; ./ il Ijursal v.-s.sel ; * One c.f llie " liearls" or eoii- 

 trac'UIe dilatati.jiis (.f the iiseielolKeiiial vesael.H. B, Aiiti'vioe portion of Lmnhrii-us 

 /cerc.sV/v's, laiil opeMi and enlar^^ed : u Month ; ^i Pliarynx ; ;7 tinllet; i/t (Esophageal 

 glands : e Pro\'imtrienlns ; s tli/zar'd ; i Intestine : h. t»ne of the " hearts," Imrne on 

 tln> side (dth.- dorsal vessel ; t Testes ; s';) SperniatlicCcL'. (After Laukesler.) 



Order HI. Pulycii.kta. 



In the so-called Polychietoua Anneliiles, the animal is furnished 

 with hjcimiotive organs in tlie form of " foot-tnljercles," carrying 

 tnfls of bristles (tig. 81). Brancliiie are generally jiresent, in the 

 foiiii of mitgrowths of the integument, richly snjuilied with 

 bi,iiiolu;s of the jiseudoha.'nial ve.ssels. The Polycha'tous Annelides 

 are .ill iu.-i,riiie, and are of very varied habits. Tliey may be con- 



