122 A MONOGKAPII OF THE TERTIARY POLYZOA OF VICTORIA. 



3. /. aflantica, Edward Torbes. PI. XYT., fig. 17; PI. XVII., fig. 8. 



/. athndica, Busk, B.M.C., III., 11 ; C.P., II., 10 ; Ilincks, B.M.P., 451 ; McG., 

 T.E.S.A^, 1886; Smitt, Floridan liryozoa, Pt. I., 0; Waters, Q.J.G.S., 1884, 683. 



Branches dicliotomously (Ua idcd, triangular in section. Zoa>cia distinct, 

 connaie, in alternate rows of two or three, the innermost being tlu; longest, anterior 

 portions turned much forwards, smooth. Dorsal surface tlat or slightly concave, 

 finely longitudinally sulcate and occasionally transversely corrugated, the ridges 

 between the sulci finely punctate. 



S.P. ; B. Living. Northern Europe, Madeira, Florida, Australia. 



'%. I. contorta, Busk. PI. XVII., figs. 4, 5. 



I. contorta, Ikisk, B.M.C., III., 12. 



Zoarium consisting of dicliotomously divided branches. Zoreeia in alternate 

 .series of 4-(5, distinct throughout l)ut closely connate, tlu; u])per third shar2)ly turned 

 forwards and nearly erect, smooth (from attritioii) or Ihuily punctiite. Dorsal 

 siu'i'ace longitudinally finely ridged, the ridges continuous and separated by narrow 



grooves. 



B. ; C.B. Living. New Zealand. 



The zoa^cia are distinctly separated thi-oughout by shallow grooves whicli, 



lu)wev(>r, in some specimens are replaced by narrow raised lines. The ridges also 



on the back, are usually separated by narrow grooves which, Avitli age, ar(> 

 similarly replaced ])y narrow raised lines. 



In the fossil specimens the branches are nearly or quite straight, Avhil(> in the 

 recent they are short and contorted. I hav(>, however, one recent specimen trom 

 New Zealand in Avhieh the branches are almost straight, so that I see no reason for 

 separating the present even as a variety. 



5. /. geminata, n.sp. PI. XVII., fig. 7. 



Branches rounded in front, slightly hollowed behind ; whole surface; closely 

 punctate. Zocecia elongated, indistinct, arranged in alternate .«eries of two, united 

 cxcejit at the extremities. Dorsal surface* transversely rugose. 



S.P. 



6. 7. irujova, n.sp. PI. XVII., fig. 6. 



Zoarium dicliotomously branclunl ; branches trigonal in section, posteriorly very 

 sliiihtlv convex, flat or usually slitjjhtlv holh)wed. Zocccia in alternate series of 

 three, distinct tiiroughout, curved slightly forwards at the anterior extremity, 



