120 A MONOGRAPH OF THE TERTIARY POLYZOA OF VICTORIA. 



spiiu' :u-ticulated to a hollow process behind and a little below the mart^in. Branches 

 originating immediately below the thyrostome of a /oceciiim, usually the second. 



M.C. Living. Alctoria. 



At once distinguished Crom all the other s})ecies by the single spine articulat(^d 

 behind tlie thyrostonu>. The upper part and orifices of the zooicia also project 

 farther beyond the edge of the branch. 



7. a feiinis, McG. PI. XVI., fig. 7. 



a tennis, McG., P.Z.V., 39. 



Internodes with 4-8 zooecia, punctate. Zorocia very narrow, distinct, peristomo 

 much produced and turned forwards and oiil wards ; thyrostome circular, unarmed. 

 Ofjocia pyriform, with a distinct tubular opening. Branches originating IVom the 

 outer and posterior surface of a zocecium. 



M.C. Living. Victoria. 



I have only the specimen figured, bul thei'e is no doubt of \\u) identification. 



II. INARTICULATA. 



Zoariuni continuous, not divided into intei'nodes, erect, adnal(> or enerusting ; 

 radical tiilics wlicii [H'csenl- multilocular and calcareous. 



Family Ipmoneid/E. 



Zoariuni (M-ect, hranehed, branches distinct or anastomosing. Zooecia distinct, 

 opening on one surface only. 



Idmonca, Lamouroux. 



Zocecia arranged in parallel or subparallel rows, diA^erging on each side from the 

 mesial line. 



1. 7. hochstetteriana, Stol. PL XVI., figs. 12-16. 



Crisrna hochsfctteriana, Stol., Foss. Bryoz., Orakei Bay, p. 113 ; Idmonca 

 hochstellerkoia. Waters, Q.J.G.S., 1881, G81. 



Zoarium irregularly branched; branches triangular, with a smooth raised ridge 

 down the middle. Jlows of zotecia alternate, considerably ^jrojeeting. Zoa'cia 

 usually three in each lateral series, closely luiited and confiuent, slightly produced 

 at the thyrostomes, whole surface anterior and dorsal, ^\■ith numerous elongated pores 



