tube 

 t have a firm substratum tc which to cement its^ovit it is aeen 



(90) 

 of the jar. In its natural habitat, Phoronia architecta aoea 

 not 



fro.T: the above observation tiiat wi.on a solia surface presents it- 

 self, the tube may take on tiie condition fcuna in some cf the 

 other species of Phoronis v;riicii are attachea to rocks ana shells, 



Phoronis architecta lives at about lov: v/ater i.-..*-a vii "nc 

 sc>,na b^wo^-uo h-'cn u.rr very numccus in Beaufort harbor and, as 

 _ rule, the individuals occur in patches. Three or four hun- 

 drea speciriiens are often found within a radius 0+"" four cf five 

 feet, but one is -very apt to find isolated specimens while dig- 

 gin^: in the sand anyv/he-n in the harbor. 



Only rarely have 1 fouiiO tr.o tubes projectin.^ above the sur- 

 fS-ce oj.' t;.e oc.na o^a Aiidrews (1) has describea, and in these ca- 

 ses, the condition was aue to Disturbances o "^' the surface of the 

 sand, such as hollov/s maae by Callinectes. Usually the upper 

 end of ti.e tube is r*- .. -^ ^ . 5 c.u. belo\7 tx.e our fac^ cf the sand. 



The average length of these tubes is 1? cm. and th3 average 

 width, a little over 1 rrcm. The adult when rem v-a ^-c m ito tube 

 is c^bout 1 mai. in aiameter in thie posterior one-tiiira ^^nd slij.ht- 

 ly les? in the anterior two-thirds. ("P'iL.ol) Tne length of 

 specimens taken out of the tubes varies with the auiount of con- 

 traction from 20 to 26 rm>. , v.-nich figures are consiaerably lower 

 . an the length given by Ajidrews (about 50.:^.). Tx.r. specimens 



