NOKTH AMKUICAX KAULY TERTIARY BRYOZOA. 



83 



Cicatrix or the ovlcell ff- 



Crypto cyst 



3ymnocyst (tremocyatal)- 

 Mural rlra- 



Opesium 

 Interzooeclal avlcularium J 



Primoserial zooeciuro 



- Bllnd( sealed) zoo eciun 



l Olocyst 



<:' I Trace of spine 



Mural rim of Inner zooecium 



---Regenerated zooecium 

 ..-Frontal or dependant avicuiariura 

 .JJymnocyst (olocystal) 



Ovlcell 



\ 



B -55 



FIG. ^3. sinii-iiirc nf tlie Membraniporae. 



A. Sketch showing tcnninolo.Lty. 



B. .\cuntlwdcsiit xitnnii! Aiidiniin. IM'li. ]>r;iwiii.ii showing slriictui't 1 . s.'i. 

 Waters. l!ti:;. I in. ineseiii'liyiiintoiis liMinifnis : /). polypiile in wlik-li histolysis liiis funnnencecl : 

 S, scptula. 



( '. Ahli'i'inii iimlultixii, iiuw sjicrics. \"ii j \v <>( xoowia. X liO. /', inipr^ssi<in ciirn-spdniling t" 

 lurid s|Kit: or, ovicvll ; x<l. distal scpmla: *7. lateral septida. 



D. Allti-n/Kii-ii iiniinilifcni Hinrks. ISSII. \'icu of tln> liac-k of a '/. .-inni. >! 14.". (After 



Xorman. I'.io:!. i n . oiienings resiilthiL' from the avicnlaria: <J. Hi. lurid bay; /*. lurid xp,,i. 



E. Mcmltraniiiiiriitu ( lii/liixtrtt \ /lulu Hutu 1 >'< irlpimix . is:,::. Cast .M ilir interior, after de 

 rali-ilication, '/. 4.1. I After I'.eissel, IMl.'i.i v,/. distal septula : .v/. lateral sejitnla: :. /.ooeciuiu. 



The communication jiores betueen the /ooeriii. here niueh enlargcil, have the aspect of 

 small canals. They serve as passage for ilir meseiirhyinatous fibers. 



